JP4799100B2 - Optical transmission line discrimination device and optical transmission line management system using this optical transmission line discrimination device - Google Patents

Description

  In the present invention, an optical transmission line such as an optical fiber that is an optical transmission medium used for optical communication, LAN (local area network), optical wiring or the like is not broken, or an optical signal is transmitted through such an optical transmission line. An optical transmission path discriminating device used for discriminating the state of the optical transmission path such as whether it is normally transmitted, an optical termination tray, an optical termination unit, an optical termination apparatus using this optical transmission path discrimination apparatus, And an optical transmission line management system.

  In general, the optical termination device is mainly used as a place for determining the connection state and the live line state of the optical transmission line. Optical termination devices include optical terminations inside and outside the office building, optical closures used in underground pipelines and overhead columns, optical termination boxes / optical cabinets / optical rosettes mainly used in homes, etc. . Among these optical terminations and optical closures, the optical unit (optical panel) and optical component are used to store the connection part, branching part, pre-length part, etc. of the optical transmission medium (optical fiber). It is an end tray.

  The optical termination device is mainly used for connection of an optical cable, branching, storage of extra length, and the like, and a large number of connection portions of an optical transmission medium are stored. Like the optical closure 53 shown in FIG. 9, these optical connection portions 1 and 25 are arranged in the optical termination device 53 using an optical unit / optical termination tray 51. For connection of the optical fiber 2 of the optical cable 54, fusion splicing, mechanical splice, or optical connector is used.

  The optical termination frame is configured, for example, by providing a plurality of optical termination units each containing a plurality of optical termination trays in the vertical direction. The optical termination tray includes a fusion spliced portion of an optical fiber of an optical cable drawn into the optical termination device from the outside and an optical fiber with a one-end connector wired in the optical termination tray, and optical fibers before and after the optical fiber. Store extra length. The fusion splicing portion is fixed by a fusion reinforcing sleeve and stored in a fusion reinforcing sleeve storage holder provided on the optical termination tray. The connector of the optical fiber with a one-end connector wired in the optical termination tray is inserted into an adapter provided in the optical termination tray.

  A schematic configuration example of the optical closure 53 is shown in FIG. The optical closure 53 is mainly installed in an aerial or underground pipe line of the optical transmission line. In order to extend the optical cable 54, the optical fibers 2 of the optical cable 54 are fused and the fusion spliced portion is reinforced by the fusion reinforcing sleeve 25, and the extra length of the fusion reinforcing sleeve 25 and the optical fiber 2 before and after the fusion reinforcing sleeve 25. Are divided and stored in a plurality of optical termination trays 51. Further, the fusion reinforcing sleeve 25 is stored in a fusion reinforcing sleeve storage holder 52 provided on the optical termination tray 51.

  The optical termination unit is configured by storing a plurality of optical termination trays adjacent to each other vertically or horizontally. An optical fiber connector is inserted into the optical adapter in each optical termination tray. One end of an optical jumper cord, which is a signal transmission line, is connected to this optical fiber connector, and an optical fiber connector is also connected to the other end of the optical jumper cord, so that an optical component housed in another optical termination unit is accommodated. Inserted into the end tray optical adapter. That is, the optical cords are wired by connecting the optical termination units with the optical jumper cords, and the wiring of the optical cords is changed by changing the insertion position of the optical connector.

  The structure of a general fusion splicing part is shown in FIG. The fusion splicing part 56 of the optical fiber 2 is protected by a fusion reinforcing sleeve 57, and mechanical strength is ensured. The fusion reinforcing sleeve 57 includes a heat shrinkable tube 58, a hot melt resin tube 59, and a support body 60. The heat shrinkable tube 58 constitutes the outermost layer of the fusion reinforcing sleeve 57, and shrinks when heated at about 80 to 100 ° C. The hot melt resin tube 59 melts when heated at 80 ° C., covers the fusion splicing portion 56 when the temperature is returned to room temperature, and fixes the support 60 and the heat shrinkable tube 58 to each other. The support body 60 is reinforced so as to give a tensile strength against bending and expansion / contraction of the fusion splicing portion 56 covered with the hot melt resin tube 59.

  As an optical transmission line discriminating apparatus for discriminating the state of an optical transmission line and the state of an optical signal transmitted through the optical transmission line, a “cardiac wire contrast device (discriminator)” disclosed mainly in Patent Document 1 has heretofore been disclosed. In addition, “optical tap and photodetector” are used.

  A “core wire contrast device” is a device that detects by leaking a part of an optical signal by bending an optical fiber core wire constituting an optical transmission line. Generally, it is a device for discriminating an optical transmission line by inserting discrimination light from a station building into the transmission line and detecting the discrimination light, and is used for a continuity test or the like when laying the transmission line. In some cases, it is possible to determine whether the optical signal is propagating through the optical transmission medium based on the current optical signal without specially inserting the determination light. Since this “cardiac wire contrast device” only needs to cause bending in the optical transmission medium (optical fiber) only when discriminating, there is no factor that increases optical transmission loss during the time when the optical signal is not discriminated.

  An optical tap is a component that extracts part of the transmitted light. Cut the optical transmission medium (optical fiber) in the optical transmission line, insert and connect it between the transmission lines, and combine it with a photodetector. For example, the optical transmission line can be discriminated in the same manner as in the “core wire contrast device”.

In addition to the “cardiac contrast device”, there is also an apparatus as disclosed in Patent Document 2 that performs the fiber core contrast by detecting the leaked light from the fusion splicing portion without bending the optical fiber.
JP-A-6-221958 JP 2005-94720 A JP 2004-309841 A Mohammad Third Khan, Shinichiro Asada, Ken Takahashi, Jun Yokoyama, "Inline Optical Power Monitor", 2004 IEICE Electronics Society Conference, presentation (document) number: C3-23, p. 155

  However, as shown in FIG. 10, the above conventional “core wire contrast device” takes one optical fiber core wire 2 from the optical termination tray 51 and grips the optical fiber core wire 2. The optical signal in the optical fiber 2 needs to be detected by the optical fiber contrast device 55. For this reason, the long extra length of the optical fiber core wire 2 is required, and the work for gripping the optical fiber core wire 2 is troublesome and the work efficiency is poor. More importantly, such work, especially when working on pillars, greatly limits the working range, causing steep bends in the optical transmission line during work and In some cases, this may lead to a serious problem in construction / maintenance work such as temporarily interrupting an optical signal, and it has a major drawback such as a cause of disconnection of the optical fiber core 2.

  In addition, the device disclosed in the above-mentioned conventional patent document 2 uses modulated light modulated at a specific frequency in an optical transmission line in order to make it difficult to be affected by sunlight and other natural noise when detecting leaked light. Is inserted, and a part of the modulated light leaking from the fusion splicing part is detected. Therefore, the device disclosed in the above-mentioned conventional patent document 2 is easily affected by sunlight and other natural noise when determining whether the current optical signal propagates through the optical transmission line medium. It had the disadvantage that it was difficult to distinguish.

  Further, in order to solve these problems, it is conceivable to use the above-mentioned conventional “optical tap and photodetector”. In this case, when detecting an optical signal, the operation of taking out one optical fiber core 2 from the optical termination tray 51 and gripping the optical fiber core 2 does not occur. Although there is little possibility of occurrence of a problem such as disconnection, it is necessary to install in advance on all optical transmission paths to be discriminated, and it is necessary to insert, connect, install and hold optical components (optical taps). For this reason, the above-mentioned conventional “optical tap and photodetector” have a great disadvantage that the place to discriminate is greatly limited and the cost is inferior. In addition to the cost, a storage space for optical components and the like is required separately, and insertion loss and connection loss due to the optical components always occur. Therefore, conventionally, “optical tap and photodetector” have not been used for discriminating such an optical transmission line. In spite of the drawbacks described above, the conventional “cardiac wire contrast device” has been widely used in general.

  In the above-mentioned conventional “cardiac wire contrast device”, leakage light caused by bending of the optical fiber is basically detected and used for discriminating the working light. It greatly depends on the wavelength, and in the case of the same bending rate, the loss at the long wavelength is larger, and the leakage amount of the optical signal is larger at the long wavelength. Accordingly, when detecting an optical signal with a short wavelength, it is necessary to bend the optical fiber more greatly than with a long wavelength, and the optical loss at the long wavelength is greatly increased. In this case, if long-wavelength signals are transmitted at the same time, the long-wavelength signals are likely to cause a transmission failure, and there is a drawback that application may be limited.

  In addition, leakage light caused by bending of the optical fiber passes through the coating layer of the optical fiber and diffuses over a wide range with absorption and scattering. Therefore, when the coating layer is thick, the light detection efficiency is greatly reduced. Had the disadvantage of

  In order to improve this, it is necessary to change the bending condition between when detecting a long wavelength signal and when detecting a short wavelength signal, but the wavelength of the signal light is not necessarily specified. There was a possibility that it could be a cause of accidental disconnection. In addition, even when the wavelength of the signal light is specified, there are disadvantages such as the necessity of collating the wavelength of the signal light, and the complicated work such as replacement of the bending jig, and the like. There was a possibility of inducing work and workability deterioration.

  In this way, the bending method has a drawback in its application range, but if this is overcome, it is expected that the application range of the working light discriminating apparatus will be expanded.

The present invention has been made to solve such a problem, and includes an optical leakage unit that leaks part of an optical signal propagating through an optical transmission line, and an optical detection unit that detects the leaked optical signal. In the optical transmission line discriminating apparatus for discriminating the state of the optical signal transmitted through the optical transmission line or the optical transmission line ,
The light leakage portion has a shape that fits into the light detection portion and is separated from the light detection portion, and has a first component having a curved surface that bends the optical transmission path, and a first configuration A second component having a shape that fits with the component is provided as a component,
The light detection part has a shape that fits into the light leakage part and is separated from the light leakage part. The light detection part fits into the light leakage part only when the state of the optical transmission path is determined, and the fitting Further, the first component and the second component are further fitted together to bend the optical transmission path, thereby leaking a part of the optical signal and detecting the leaked optical signal. .

According to this configuration, a part of the optical signal transmitted through the optical transmission line is leaked at the light leakage part by bending the optical transmission line by fitting the first component and the second component , by fitting the light detecting section to the optical leakage unit, an optical signal that has leaked is detected by the light detecting unit. Therefore, as it is without moving the light leakage section provided in the optical transmission line, by fitting the light detecting portion separated from the light leakage portion to the light leakage section, an optical signal transmitted through the optical transmission path Can be detected.

  Therefore, the long extra length of the core wire is not required as in the conventional core wire contrast device, and the operation of taking out the core wire stored in the optical termination tray or the like when performing the core wire contrast is eliminated. Work efficiency. Further, since the work of taking out the core wire on the column is not necessary, there is no trouble factor of the work, and the disconnection factor of the optical fiber core wire is also eliminated.

  In addition, unlike conventional optical taps and photodetectors, it is not necessary to insert a separate light leakage mechanism composed of optical parts such as optical taps into the optical transmission line. No need to insert, connect, install, or hold. For this reason, the location to be discriminated is not greatly limited, and it is not necessary to install in advance in all the optical transmission paths for discriminating optical components, so that it is economical. Further, a separate storage space for optical components or the like is not required, and insertion loss and connection loss due to optical components do not always occur. Therefore, an optical transmission line discrimination device with improved optical signal detection rate is provided.

  In addition, unlike the conventional device disclosed in Patent Document 2, it is not affected by sunlight or other noise in the natural world, so that it is possible to reliably determine the optical transmission line.

Further , according to this configuration, the optical transmission path is bent only at the time of determination . Therefore, when the optical transmission path or the optical signal is not determined, there is no cause for increasing the optical transmission loss. As a result, an optical transmission line with less optical transmission loss is provided.

The present invention further includes an optical leakage unit that leaks a part of an optical signal propagating through the optical transmission line, and a light detection unit that detects the leaked optical signal, and transmits the optical transmission line or the optical transmission line. In an optical transmission line discriminating apparatus that discriminates the state of an optical signal ,
The light leakage portion has a shape that fits into the light detection portion and is separated from the light detection portion, and has at least one connection point on the optical transmission line, and a part of the optical signal from the connection point. While leaking, by bending the optical transmission line near the connection point, leak a part of the optical signal from the bent part,
The light detection unit is configured to be separated from the light leakage part, and detects the optical signal leaked from the connection point and the optical signal leaked from the bent part by fitting to the light leakage part. To do.

According to this arrangement, part of the optical signal from each connection point and the bent portion of the light leakage portion leaks, by fitting the light detecting section to the optical leak portion, the optical signal is leaking from the connection point The optical signal leaked from the bent portion is detected by the light detecting portion. Therefore, as it is without moving the light leakage section provided in the optical transmission line, by fitting the light detecting portion separated from the light leakage portion to the light leakage section, an optical signal transmitted through the optical transmission path Can be detected.

  Therefore, this configuration also eliminates the need for a long extra length of the core wire unlike the conventional core wire contrast device, and the core wire stored in the optical termination tray or the like when performing the core wire contrast. The work efficiency is improved because there is no work to take out. Further, since the work of taking out the core wire on the column is not necessary, there is no trouble factor of the work, and the disconnection factor of the optical fiber core wire is also eliminated.

  This configuration also eliminates the need to insert a separate light leakage mechanism composed of optical components such as optical taps into the optical transmission line unlike conventional optical taps and photodetectors. It is no longer necessary to cut and insert / connect / install / hold optical components. For this reason, the location to be discriminated is not greatly limited, and it is not necessary to install in advance in all the optical transmission paths for discriminating optical components, so that it is economical. Further, a separate storage space for optical components or the like is not required, and insertion loss and connection loss due to optical components do not always occur. Therefore, an optical transmission line discrimination device with improved optical signal detection rate is provided.

  In addition, unlike the conventional device disclosed in Patent Document 2, it is not affected by sunlight or other noise in the natural world, so that it is possible to reliably determine the optical transmission line.

  Furthermore, in this configuration, the main cause of the loss at the connection point is due to the misalignment of the core of the optical fiber, in which case light tends to leak on the short wavelength side where the mode field diameter is small, and the wavelength relative to the connection loss. The characteristic tends to be reversed from the case where the optical transmission line is bent. For this reason, by using both the leaked light from the connection point and the leaked light from the bent part, the wavelength dependence of the loss is reduced, and the practical wavelength range is significantly larger than that of the conventional cord contrast device. Improved and widened. As a result, an optical transmission line discriminating apparatus with improved optical signal detection rate is provided.

  Further, the present invention is characterized in that at least a part of the coating layer of the bent portion in the light leakage portion is removed from the optical transmission line.

  According to this configuration, a part of the coating of the optical transmission line is removed, and a light leakage part is formed in the removed part, thereby detecting an optical signal with a low loss with respect to an optical transmission line of any outer diameter. It becomes possible to do.

  In addition, the present invention is characterized in that the light leakage part includes an RFID.

  According to this configuration, by storing the wiring information of the optical transmission path in the RFID, it is possible to know the wiring information at the same time as the contrast of the optical transmission path and to perform wiring management.

Further, the present invention is characterized in that the light leakage portion is provided in at least one of the optical termination tray and the optical termination unit in the optical termination device installed in the optical transmission path.

According to this configuration, Tadashi Mitsunari tray or Tadashi Mitsunari unit in the Tadashi Mitsunari apparatus functions and effects described above are provided for the optical transmission path determination device exhibited.

  Further, the present invention provides an optical transmission line management system that manages optical fiber lines that constitute an optical transmission line, and uses an optical transmission line discriminating device in which an optical leakage part is equipped with an RFID, and It is characterized in that the state of the optical signal transmitted through the transmission line is determined, the information on the optical transmission line is identified by RFID, and the optical fiber line is managed.

  According to this configuration, by utilizing the individual optical fiber wiring information stored in the RFID, a new configuration of light combining an optical transmission line determination device and an existing optical transmission line management system such as a data center. It becomes possible to construct a transmission line management system.

According to the present invention, as described above, as it is without moving the light leakage section provided in the optical transmission line, by fitting the light detecting portion separated from the light leakage portion to the light leakage section, An optical signal transmitted through the optical transmission line can be detected.

  In addition, by utilizing individual optical fiber wiring information stored in RFID, optical transmission line management with a new configuration combining an optical transmission line discriminator and an existing optical transmission line management system such as a data center. It becomes possible to build a system.

  Next, the best mode for carrying out the present invention will be described.

  FIG. 1 shows a light leakage part 1 constituting an optical transmission line discrimination device according to a first embodiment of the present invention. FIG. 1 (a) is a perspective view of the light leakage part 1, and FIG. ) Is a perspective view of the outer case 5 of the light leaking portion 1, FIG. 10C is a cross-sectional view of the light leaking portion 1, FIG. 10D is a longitudinal sectional view of the light leaking portion 1 in a normal state, and FIG. e) shows a longitudinal sectional view of the light leakage portion 1 at the time of optical signal discrimination.

  The light leakage portion 1 bends the optical fiber strand 2 having an outer diameter of 0.25 mm whose outer skin is UV-coated, and leaks a part of the optical signal propagating through the optical fiber strand 2. The light leakage portion 1 includes a convex portion 3 having a curved surface that efficiently bends the optical fiber 2 and a concave portion 4 that can be fitted to the convex portion 3 with a space 9 therebetween. The optical fiber 2 and the elastic body 7 are inserted between the convex portion 3 and the concave portion 4. An opening 6 for allowing leakage light from the bent portion of the optical fiber 2 to pass therethrough is provided in the upper portion of the recess 4, and a hole 10 into which the RFID 8 is inserted is formed.

  These members are accommodated in the outer case 5 shown in FIG. Since the optical fiber 2 passes through the grooves on both sides of the outer case 5 and is inserted into the light leaking portion 1, the optical fiber 2 is not inserted obliquely into the light leaking portion 1. That is, the outer case 5 is not merely a container for the light leakage part 1 but also serves to guide the optical fiber 2.

  Further, the optical fiber 2 is placed on the convex portion 3 placed in the outer case 5, and the concave portion 4 is placed thereon like a lid. Since it fits inside 5, it does not protrude from the top of the outer case 5. As a result, the optical fiber 2 is normally held in the light leakage portion 1 as shown in FIG.

  Usually, since there is a space 9 between the convex portion 3 and the concave portion 4, the optical fiber 2 in the light leakage portion 1 is substantially linear as shown in FIG. For this reason, in the state of FIG. 1D, the optical signal does not leak and no optical loss occurs in the optical transmission line. However, as shown in FIG. 1 (e), by applying a downward pressure in the vicinity of the opening 6 of the recess 4, the elastic body 7 is compressed and the recess 4 moves toward the protrusion 3, and the protrusion 3 And the interval between the recesses 4 is narrowed. For this reason, the optical fiber 2 sandwiched between the convex portion 3 and the concave portion 4 is bent along the fan-shaped curved surface of the convex portion 3 and the concave portion 4, and an optical signal leaks from the bent portion.

  The optical fiber strand 2 in this embodiment has a UV coating and an outer diameter of 0.25 mm. However, if the optical fiber strand 2 is in the form of an optical cord having a PVC coating, the light leakage portion 1 is previously provided. In some cases, the covering of the portion covered with the tool is removed with a tool or the like, and the outer skin is made into a UV coating state, or it may be fixed without removing the PVC coating, which is limited to the mode shown in FIG. Absent.

  Further, the external dimension (L × D × H) of the light leakage portion 1 is, for example, about 35 × 5 × 12 [mm], and the sector curvature radius of the convex portion 3 and the concave portion 4 is, for example, about 10 [mm]. However, the curved shape of the convex portion 3 and the concave portion 4 is not limited to a fan shape but may be a W shape or an S shape, and is not limited to the fan shape as shown in FIG. Moreover, although the material of the convex part 3, the recessed part 4, and the outer case 5 is ABS resin, for example, it may be rubber | gum and a plastics and is not limited to ABS resin. Moreover, the elastic body 7 provided between the convex part 3 and the recessed part 4 may be a metal spring, sponge, etc., and is not limited to rubber | gum.

  FIG. 2 is an example of an internal configuration of the RFID 8 provided in the light leakage unit 1.

  The RFID 8 is an abbreviation of “Radio Frequency Identification” and is a kind of ID (identification) tag, a ROM (read only memory) 11 capable of writing and erasing data by electrical processing, and an antenna 12 communicating with the outside. And an LED (light emitting diode) 13 that is turned on as a signal at the time of communication and a CPU (central processing unit) 14 that performs communication control and light emission control of the LED 13 are electrically connected, and these are connected by a plastic case (not shown). Molded and configured.

  Further, the RFID 8 does not have a power supply by itself, but operates by using an electromagnetic wave having a frequency of 13.56 MHz generated by the photodetection terminal 15 (see FIG. 3) which is a tag reading / writing means. However, there are cases where the power supply itself is provided, the LED 13 is not provided, and the use frequency is in the 134 kHz band, UHF band, and 2.45 GHz band, and the present invention is not limited thereto.

  FIG. 3A is an external perspective view of the light detection terminal 15 constituting the optical transmission line discrimination device according to the present embodiment, and FIG. 3B is a state in which the light detection terminal 15 is fitted to the light leakage portion 1. FIG. 2C is a longitudinal sectional view when pressure is applied in a state where the light detection terminal 15 is fitted to the light leaking portion 1.

  The light detection terminal 15 includes a light detection unit 16, a display unit 17 that displays detection information on a screen, and an information input unit 18 that inputs individual wiring information of optical fibers. The light detection unit 16 is provided with a light receiving element (not shown) for detecting leakage light and a transmission / reception antenna (not shown) for the RFID 8. It has a shape that fits into the opening 6 provided in the recess 4 of the leaking portion 1. This transmission / reception antenna is used for calling individual wiring information of the optical fiber 2 stored in the RFID 8 and the stored current state, or updating information of the RFID 8 by communicating with the RFID 8.

  When confirming the core wire state (presence / absence of optical signal) and individual wiring information of the optical fiber 2 to which the light leakage part 1 is fixed, as shown in FIG. 3B, the detection part 16 of the light detection terminal 15 The tip 19 is inserted into the opening 6 of the light leaking part 1 and fitted. Thereafter, as shown in FIG. 3C, the concave portion 4 moves to the convex portion 3 side by applying pressure in the vertically downward direction to the optical fiber 2 in the fitted state. The optical fiber 2 sandwiched between the recesses 4 is bent. Thereby, if the optical signal is transmitted to the optical fiber 2, the optical signal leaks from the bent portion of the optical fiber 2. At this time, the distal end portion 19 of the detection portion 16 of the light detection terminal 15 is sealed by the concave portion 4 and the outer case 5 of the light leakage portion 1, so that the optical fiber element is not affected by sunlight or other natural noise. Only leakage light from the bent part of the line 2 is detected.

  The leaked optical signal proceeds to the opening 6 and is detected by the light receiving element at the tip 19 of the light detection unit 16 of the light detection terminal 15 fitted in the opening 6. As a result, if the signal photoelectrically converted by the light receiving element is equal to or greater than a preset reference value, an optical signal is transmitted to the optical fiber 2 by a determination circuit (not shown) provided in the light detection terminal 15. If it is less than the reference value, it is determined that no optical signal is transmitted to the optical fiber 2, and the result is displayed on the display unit 17.

  FIG. 3A shows an example in which the light detection unit 16 is integrated with other parts as the light detection terminal 15, but the light detection unit 16 is not necessarily integrated with other parts of the light detection terminal 15 in this way. There is no need to make them, and the light detection unit 16 and these light detection terminals 15 may be connected by cords or connected wirelessly.

  Further, when the optical fiber 2 is fixed to the light leakage part 1, the individual wiring information of the optical fiber 2 is written in the RFID 8 by using the light detection part 16, or the RFID 8 into which information has been written in advance is used. When writing the individual wiring information of the optical fiber 2 into the RFID 8, for example, the information is input by the information input unit 18 of the light detection terminal 15, and the detection unit 16 of the light detection terminal 15 is connected to the RFID 8 of the light leakage unit 1. By pressing an information write key (not shown) of the RFID 8 provided in the information input unit 18 in a state of about several centimeters, an electromagnetic wave of a write signal is transmitted from the antenna of the light detection terminal 15 to the RFID 8. Is done. Using it as an energy source, the CPU 14 of the RFID 8 is driven, and at the same time, the LED 13 is lit. Thereafter, the individual wiring information of the optical fiber 2 is stored in the ROM 11.

  In addition, in the state where the light detection unit 16 of the light detection terminal 15 is close to the light leakage unit 1, the unique ID unique to the RFID 8 of the target light leakage unit 1 is input by the information input unit 18 of the light detection terminal 15. Then, when an information call key (not shown) of the RFID 8 provided in the information input unit 18 is pressed, an electromagnetic wave of a call signal to the RFID 8 is transmitted from the antenna of the photodetection terminal 15, and the CPU 14 of the RFID 8 is used as an energy source. Is driven and the LED 13 is lit at the same time. Thereafter, the individual wiring information of the optical fiber 2 stored in the RFID 8 is returned to the antenna of the light detection terminal 15 as a response signal, and the content of the information is displayed on the display unit 17.

  According to the optical transmission line discriminating apparatus according to the present embodiment constituted by the light leakage part 1 and the light detection terminal 15 described above, the optical fiber 2 is transmitted by bending the optical fiber 2 that is an optical transmission line. A part of the optical signal to be leaked is leaked by the light leakage unit 1, and the light detection unit 16 is brought close to or in contact with the light leakage unit 1, so that the leaked optical signal is detected by the light detection unit 16. For this reason, the light detection unit 16 separated from the light leakage unit 1 is brought close to or in contact with the light leakage unit 1 without moving the light leakage unit 1 provided on the optical fiber 2, thereby An optical signal transmitted through the fiber strand 2 can be detected.

  Therefore, unlike the conventional cord contrast device 55 shown in FIG. 10, a long extra length of the cord is not required, and the cores stored in the optical termination tray 51 or the like are used when performing the cord contrast. The work efficiency is improved by eliminating the work of taking out the wire 2. Moreover, since the operation | work which takes out the core wire 2 on a pillar becomes unnecessary, the obstruction factor of an operation | work disappears and the disconnection factor of the optical fiber core wire 2 is also removed.

  In addition, the optical transmission line discriminating apparatus according to the present embodiment needs to insert a separate light leakage mechanism composed of optical parts such as an optical tap into the optical transmission line, like the conventional optical tap and photodetector. Therefore, it is not necessary to cut the optical transmission line and to insert / connect / install / hold optical components. For this reason, the location to be discriminated is not greatly limited, and it is not necessary to install in advance in all the optical transmission paths for discriminating optical components, so that it is economical. Further, a separate storage space for optical components or the like is not required, and insertion loss and connection loss due to optical components do not always occur. Therefore, an optical transmission line discrimination device with improved optical signal detection rate is provided.

  In addition, unlike the conventional device disclosed in Patent Document 2, it is not affected by sunlight or other noise in the natural world, so that it is possible to reliably determine the optical transmission line.

  Moreover, since the optical transmission line discriminating apparatus according to the present embodiment is fixed by gripping or covering the optical leakage part 1 on the optical fiber 2, it can be applied to an existing optical fiber line.

  Further, in the optical transmission line discriminating apparatus according to the present embodiment, the optical fiber 2 is bent by contacting the light detection unit 16 only when the light leakage part 1 discriminates the state of the optical transmission line. It is configured. Therefore, according to this configuration, the optical fiber 2 is bent only at the time of determination. Therefore, when the optical transmission path or the optical signal is not determined, there is no cause for increasing the optical transmission loss. As a result, an optical transmission line with less optical transmission loss is provided.

  Further, in the optical transmission line determination device according to the present embodiment, the optical transmission line may be configured such that at least a part of the coating layer of the bent part in the light leakage part 1 is removed. According to this configuration, by removing a part of the coating of the optical transmission line and forming the light leakage portion 1 in the removed portion, an optical signal can be transmitted with low loss with respect to the optical transmission line of any outer diameter. It becomes possible to detect.

  Moreover, in the optical transmission line discriminating apparatus according to the present embodiment, the light leakage unit 1 accommodates a plurality of optical fiber strands 2 and individually or at least partially receives a plurality of optical signals in the plurality of optical fiber strands 2. You may comprise so that it may have a structure discriminating collectively. According to this configuration, it is possible to cope with a plurality of optical fiber strands 2 by installing one optical transmission line determination device. As a result, it is not necessary to install an optical component for each optical transmission line unlike an optical tap, so that an optical transmission line discrimination device with good economic efficiency is provided.

  Further, in the optical transmission line determination device according to the present embodiment, the light leakage unit 1 includes the RFID 8. For this reason, by storing the unique wiring information (line name, construction date and time, destination) of the optical fiber 2 in the RFID 8, the wiring information can be known simultaneously with the contrast of the optical transmission line, and the wiring management. Can be done.

  In the optical transmission line determination device according to the present embodiment, the light detection unit 16 has a function of detecting information stored in the RFID 8. For this reason, the wiring information of the optical fiber 2 stored in the RFID 8 is detected by the light detection unit 16 and can be confirmed by the light detection terminal 15. Accordingly, when performing the determination of the core wire state using the light detection terminal 15, the determination of the core wire state determination and the specific wiring information of the optical fiber is performed by calling the specific wiring information of the optical fiber 2 stored in the RFID 8. Can be performed simultaneously, and the optical fiber 2 to be inspected can be more accurately identified.

  Further, the optical transmission line determination device according to the present embodiment has a function of causing the optical detection unit 16 to store information in the RFID 8 in addition to the above-described function of detecting information stored in the RFID 8. For this reason, the wiring information of the optical fiber 2 stored in the RFID 8 is detected by the light detection unit 16 and can be confirmed by the light detection terminal 15 and can be rewritten by the light detection unit 16. As a result, it is possible to cope with a change in wiring information of the individual optical fiber 2.

  In addition, according to the optical termination tray or optical termination unit or optical termination device provided with the light leakage portion 1 of the optical transmission path determination device according to the present embodiment, the above-described effects of the optical transmission path determination device are provided. An optical termination tray or optical termination unit or optical termination device is provided.

  In the present invention, the application of the RFID 8 according to the present embodiment is not essential, but the optical transmission path or the optical transmission path is determined by using the optical transmission path discriminating apparatus according to the present embodiment in which the light leakage unit 1 includes the RFID 8. The status of the optical signal to be transmitted can be determined, and information on the optical transmission path can be identified by the RFID 8 to manage the optical fiber line. According to this configuration, by utilizing the individual wiring information of the optical fiber 2 stored in the RFID 8, a novel combination of an optical transmission line determination device and an existing optical transmission line management system such as a data center is combined. It becomes possible to construct an optical transmission line management system having a configuration.

  FIG. 4A is a perspective view showing the internal configuration of the light leaking portion 20 according to the second embodiment of the present invention, FIG. 4B is a cross-sectional view of the light leaking portion 20, and FIG. The vertical cross-sectional view of the light leaking part 20 at the normal time, FIG. 4D shows the vertical cross-sectional view of the light leaking part 20 at the time of optical signal discrimination.

  As shown in FIGS. 4A and 4B, the light leakage portion 20 includes a fusion reinforcing sleeve 25, an outer case 21, and an RFID 8. The RFID 8 is fixed to, for example, the back side of the outer case 21 with a double-sided tape, but the method for fixing the RFID 8 is not limited to this. The outer case 21 is provided with a lid 22 that can be opened and closed. When the lid 22 is closed, the optical fiber 2 is in a state of passing through holes 24 that are open on both side surfaces of the outer case 21. The fusion reinforcing sleeve 25 is composed of a heat shrinkable tube 26, a hot melt resin tube 27, and a support 28. The material of the support 28 is stainless steel, but it may be glass or ceramic and is not limited to this. The outer dimension (L × φ) of the fusion reinforcing sleeve 25 is, for example, 30 × φ3 [mm], but is not limited thereto.

  The fusion reinforcing sleeve 25 protects the fusion splicing portion 29 of the optical fiber 2 and ensures the mechanical strength. The heat shrinkable tube 26 constitutes the outermost layer of the fusion reinforcing sleeve 25 and shrinks when heated at about 80 to 100 ° C. The hot melt resin tube 27 melts when heated at 80 ° C., covers the fusion splicing portion 29 when the temperature is returned to room temperature, and fixes the support 28 and the heat shrinkable tube 26. The support 28 is reinforced so as to give a tensile strength against bending and expansion / contraction of the fusion splicing portion 29 covered with the hot melt resin tube 27. In addition, although the connection loss value of the fusion splicing part 29 in this embodiment is set to about 0.2 dB with a wavelength of 1.3 μm, for example, it is not limited to this.

  When confirming the core wire state (presence / absence of signal light) and individual wiring information of the optical fiber 2 to which the light leakage part 20 is fixed, the tip of the detection part 16 of the light detection terminal 15 is the same as in the first embodiment. The tip 19 of the detector 16 fitted into the opening 23 is inserted into the opening 23 of the light leaking part 20 and fitted into the opening 23 to determine whether or not there is an optical signal leaked from the fusion splicing part 29 of the optical fiber 2. Detection is performed by a photodetector in the unit 19. Further, the exchange of the individual wiring information of the optical fiber 2 by the RFID 8 in the second embodiment is the same as that in the first embodiment.

  The optical transmission path discriminating apparatus according to the second embodiment is used in an optical termination tray 51 as shown in FIG. 7, but its application is not limited to this. In this case, the light leakage part 20 is fixed and stored in the fusion reinforcing sleeve storage holder 52 instead of the fusion reinforcing sleeve 25, for example. When detecting an optical signal transmitted to the optical fiber 2, it is possible to determine the core state by simply fitting the light detection terminal 15 to the light leakage portion 20 as shown in FIG. 7.

  According to the optical transmission line discriminating device according to the second embodiment described above, a part of the optical signal leaks from the fusion splicing portion 29 that is the connection point of the light leaking portion 20, and the light detecting portion is connected to the light leaking portion 20. The light detection unit 16 detects the leaked optical signal by approaching or contacting 16. For this reason, by moving the light detection unit 16 separated from the light leakage unit 20 close to or in contact with the light leakage unit 20 without moving the light leakage unit 20 provided in the optical transmission line, It is possible to detect an optical signal that transmits the signal.

  Therefore, the optical transmission line determination device according to the second embodiment also has the same effects as the optical transmission line determination device according to the first embodiment described above.

  Further, in the optical transmission line discrimination device according to the second embodiment, the main cause of the loss in the fusion splicing portion 29 is due to the axial misalignment of the core of the optical fiber 2, in which case the mode field diameter Light tends to leak on the shorter short wavelength side, and the wavelength dependence on the connection loss is less than when the optical transmission line is bent. For this reason, an optical transmission line discriminating apparatus with an improved detection rate of optical signals is provided.

  FIG. 5 is a perspective view showing the internal configuration of the light leaking part 30 according to the third embodiment of the present invention, FIG. 5B is a cross-sectional view of the light leaking part 30, and FIG. 5C is an optical signal. The longitudinal cross-sectional view of the light leak part 30 at the time of discrimination | determination is shown.

  As shown in FIGS. 5A and 5B, the light leaking portion 30 includes a fusion reinforcing sleeve 35, an outer case 31, and an RFID 8. Also in this embodiment, the RFID 8 is fixed to the outer case 31, for example, on the back side with a double-sided tape, but the method for fixing the RFID 8 is not limited to this. The outer case 31 is provided with a lid 32 that can be opened and closed. When the lid 32 is closed, the optical fiber 2 is in a state of penetrating through holes 34 that are open on both side surfaces of the outer case 31.

  As shown in FIGS. 5B and 5C, the fusion reinforcing sleeve 35 reinforces the fusion splicing portion 29 of the optical fiber 2 and bends the optical fiber 2. The heat shrinkable tube 36, a hot melt resin tube 37, and a support 38 are included. The support 38 reinforces the fusion splicing portion 29 covered with the hot melt resin tube 37 so as to give a tensile strength against bending and expansion / contraction, and at the same time, the heat shrink tube 36 and the hot melt resin tube 37. After the heat shrinkage, the optical fiber 2 is fixed in a state of being partially bent by the bent portion 39 of the support 38.

  In addition, although the material of the support body 38 is stainless steel, it may be glass and a ceramic and is not limited to this. Further, the curvature of the bent portion 39 is, for example, a radius of about 10 mm, but this curvature is not limited to this value, and the curved shape is W-type or S-type as in the first embodiment. In some cases, the fan shape is not limited to that shown in FIG. The outer dimension (L × φ) of the fusion reinforcing sleeve 35 is, for example, 30 × φ3 [mm], and the outer dimension (L × D × H) of the light leakage portion 30 according to the present embodiment is, for example, about 45 × 5 ×. Although it is 10 [mm], it is not limited to this.

  When confirming the core wire state (the presence or absence of signal light) and individual wiring information of the optical fiber 2 to which the light leakage part 30 is fixed, the tip of the detection part 16 of the light detection terminal 15 as in the second embodiment. The part 19 is inserted into the opening 33 of the light leakage part 30 and fitted. At this time, if an optical signal is transmitted to the optical fiber 2, the optical signal leaks from the fusion splicing portion 29 of the optical fiber 2, and the leaked optical signal is fitted into the opening 33. It is detected by the light receiving element at the tip 19 of the detector 16. Further, the exchange of the individual wiring information of the optical fiber 2 by the RFID 8 is the same as in the first and second embodiments.

  The optical transmission line discriminating apparatus according to the third embodiment is also used in the optical termination tray 51 as shown in FIG. 8, but its application is not limited to this. Also in this case, the light leakage portion 30 is fixed to the fusion reinforcing sleeve storage holder 52 instead of the fusion reinforcing sleeve 35 and stored in the fusion reinforcing sleeve storage holder 52, for example. When detecting an optical signal transmitted to the optical fiber 2, it is possible to determine the core state by simply fitting the light detection terminal 15 to the light leakage part 30 as shown in FIG. 8.

  According to the optical transmission line discriminating apparatus according to the third embodiment described above, part of the optical signal leaks from the fusion splicing portion 29 that is the connection point of the light leakage portion 30 and the bent portion of the optical fiber 2. The optical signal leaking from the fusion splicing portion 29 and the optical signal leaking from the bent portion of the optical fiber 2 are detected by bringing the light detection portion 16 close to or in contact with the light leakage portion 30. Detected by the unit 16. For this reason, by moving the light detection unit 16 separated from the light leakage unit 30 closer to or in contact with the light leakage unit 30 without moving the light leakage unit 30 provided in the optical transmission line, It is possible to detect an optical signal that transmits the signal.

  Therefore, the optical transmission line determination device according to the third embodiment also has the same operational effects as the optical transmission line determination device according to the first embodiment described above.

  Further, in the optical transmission line discrimination device according to the third embodiment, the main cause of the loss in the fusion splicing portion 29 is due to the axial misalignment of the core of the optical fiber 2, and in this case, the mode field diameter Light tends to leak on the shorter short wavelength side, and the wavelength characteristic with respect to the connection loss tends to be reversed from that when the optical transmission line is bent. For this reason, by utilizing both the leakage light from the fusion splicing portion 29 (or the mechanical splice portion) and the leakage light from the bent portion of the optical fiber 2, the wavelength dependency of the loss is reduced and practically used. The typical wavelength range is greatly improved and widened as compared with the conventional cord contrast device 55 shown in FIG. As a result, an optical transmission line discriminating apparatus with improved optical signal detection rate is provided.

  Further, in the optical transmission line discriminating apparatus according to the third embodiment, at least a part of the support 38 which is the protective member of the optical fiber 2 in the vicinity of the fusion splicing portion 29 is the length direction of the light leakage portion 30. Thus, the optical fiber 2 is bent in the vicinity of the fusion splicing portion 29. According to this configuration, the fusion splicing portion 29 is reinforced by the support 38 so as to give a tensile strength against bending and expansion / contraction of the fusion splicing portion 29, and at the same time, the bent portion 39 of the support 38 The fiber strand 2 is fixed in a partially bent state. As a result, the loss is kept at a constant value, and it is possible to perform stable optical signal detection.

  Further, in the optical transmission line discriminating apparatus according to the third embodiment, the light leakage part 30 is configured such that the optical fiber 2 is always bent and a part of the optical signal is always leaked. According to this configuration, since the optical fiber 2 is always bent, a part of the optical signal always leaks, and the optical signal can always be discriminated. As a result, an optical signal transmission abnormality in the optical transmission line can be detected early, and optical signal transmission with good security can be provided.

  In the case of the third embodiment, the splice loss value of the fusion splicing portion 29 is set to, for example, about 0.1 dB at a wavelength of 1.3 μm, and the excess loss caused by bending is set to, for example, about 0.05 dB. It is not limited to. For example, the curvature of the bent portion 39 may be set only to efficiently receive the leaked light from the fusion splicing portion 29 while suppressing the curvature of the bent portion 39 so as not to cause excessive loss.

  FIG. 6 is a perspective view showing the internal configuration of the optical termination tray 40 according to the fourth embodiment of the present invention.

  The optical termination tray 40 includes an optical fiber introduction guide 41, an optical fiber storage portion 42, an optical fiber presser 43, a fusion reinforcing sleeve storage holder 44, a holder lid 45, and a fitting projection 46 for fixing the holder lid. And the holder lid fixing fitting recess 47 and the RFID 8. The RFID 8 is fixed to the bottom surface of the fusion reinforcing sleeve storage holder 44 with double-sided tape. However, the method of fixing the RFID 8 is not limited to fixing with a double-sided tape. Further, the outer dimension (L × D × H) of the optical termination tray 40 is about 180 × 110 × 10 [mm], and the outer dimension (L × D × H) of the fusion reinforcing sleeve storage holder 44 is about 65 × 4. Although it is 5 × 10 [mm], it is not limited to these external dimensions.

  The fusion splicing portion of the optical fiber 2 is fixed by a fusion reinforcing sleeve 50, and the fusion reinforcing sleeve 50 is accommodated in the fusion reinforcing sleeve accommodation holder 44. The stored fusion reinforcing sleeve 50 is fixed by stoppers 49 provided at both ends of the fusion reinforcing sleeve storage holder 44. For this reason, the fusion reinforcing sleeve 50 does not jump out of the fusion reinforcing sleeve storage holder 44.

  Further, the holder lid 45 integrated with the fusion-reinforcing sleeve storage holder 44 and the fusion-reinforcing sleeve storage holder 44 are fitted by the fitting projection 46 for fixing the holder lid 45 and the fitting recess 47 for fixing the holder lid. By doing so, the same light leakage part as 2nd Embodiment is comprised. The holder lid 45 is provided with the same number of openings 48 as the fusion reinforcing sleeve 50.

  When confirming the core state (the presence / absence of signal light) of the optical fiber 2 and the individual wiring information, the distal end portion 19 of the detection portion 16 of the light detection terminal 15 is fused and reinforced as in the second embodiment. The sleeve storage holder 44 is inserted into and fitted into the opening 48 of the holder lid 45. As a result, if an optical signal is transmitted to the optical fiber 2, the optical signal leaks from the fusion splicing portion of the optical fiber 2, proceeds to the opening 48, and the detection unit fitted in the opening 48 16 is detected by the light receiving element at the tip portion 19 of 16.

  Therefore, the optical termination tray 40 according to the fourth embodiment also provides the same operational effects as the optical transmission line determination device according to the second embodiment described above.

  That is, when performing the core wire state determination using the light detection terminal 15, by calling the unique wiring information of the optical fiber 2 stored in the RFID 8, confirmation of the core wire state determination and the optical fiber unique wiring information is performed. Can be performed simultaneously, and the optical fiber 2 to be inspected can be more accurately identified.

  For example, when it is desired to identify the optical fiber strand 2 for which the core wire state determination and the individual wiring information are to be identified from the optical termination tray 40, the fusion reinforcing sleeve storage holder 44 to which the target optical fiber strand 2 is fixed. When the unique ID unique to the RFID 8 attached to the device is inquired, the individual wiring information of the target optical fiber strand 22 is acquired and the LED 13 is lit, so that the target optical fiber 2 can be easily identified. The core state can be determined.

  The optical termination tray 40 according to the fourth embodiment is, for example, in an optical termination device such as an optical termination installed in an aerial space in an optical line, a communication station, a communication base, or the like. Although used, its application is not limited to this.

  Further, the optical termination tray 40 according to the fourth embodiment also makes it possible to construct an optical transmission management system having a novel configuration using the RFID 8 and combining the optical discriminating device.

  In addition, this invention is not limited to each embodiment mentioned above, By implementing an appropriate change, it can implement in another various aspect.

  Although the optical transmission line discrimination device according to each of the above embodiments has been described as applied to an optical termination tray, the present invention is not limited to this. For example, the present invention can also be applied to an optical termination unit or an optical termination device that accommodates a plurality of optical termination trays equipped with an optical transmission path discriminating device, as in the above embodiments. Thereby, it is possible to use properly according to the number of optical transmission lines, such as a detached house, a housing complex, and an office building. Even when the present invention is applied as described above, the same effects as those of the above-described embodiments can be obtained.

(A) is a perspective view which shows the internal structure of the light leak part by the 1st Embodiment of this invention, (b) is a perspective view of the outer case of the light leak part by 1st Embodiment, (c) is 1st FIG. 4D is a cross-sectional view of the light leakage part according to the first embodiment, FIG. 3D is a vertical cross-sectional view of the light leakage part according to the first embodiment, and FIG. A plane view is shown. It is a block diagram which shows the internal structure of RFID attached to the light leak part by 1st Embodiment. (A) is a perspective view which shows the structure of the photon detection terminal by the 1st Embodiment of this invention, (b) is a longitudinal cross-sectional view of the state which fitted the photon detection terminal to the light leak part shown in FIG. c) is a longitudinal sectional view when pressure is applied in a state in which a light detection terminal is fitted to the light leakage portion shown in FIG. 1. (A) is a perspective view which shows the internal structure of the light leak part by the 2nd Embodiment of this invention, (b) is a cross-sectional view of the light leak part by 2nd Embodiment, (c) is 2nd implementation. The longitudinal cross-sectional view of the light leak part by a form, (d) is a longitudinal cross-sectional view of the state which made the light detection part fit to the light leak part by 2nd Embodiment. (A) is a perspective view which shows the internal structure of the light leak part by the 3rd Embodiment of this invention, (b) is a cross-sectional view of the light leak part by 3rd Embodiment, (c) is 3rd implementation. It is a longitudinal cross-sectional view of the state which made the light detection part fit to the light leak part by a form. It is a perspective view which shows the internal structure of the optical termination | terminus tray by the 4th Embodiment of this invention. It is a perspective view of the optical termination tray provided with the optical-transmission-path discrimination | determination apparatus by the 2nd Embodiment of this invention. It is a perspective view of the optical termination tray provided with the optical-transmission-path discrimination | determination apparatus by the 3rd Embodiment of this invention. It is a perspective view which shows the outline of the optical closure which is one of the conventional optical termination apparatuses. It is a perspective view which shows the usage of the conventional core wire contrast machine. It is a longitudinal cross-sectional view which shows the structure of a general fusion splicing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,20,30 ... Light leakage part 2 ... Optical fiber strand 3 ... Convex part 4 ... Concave part 5, 21, 31 ... Outer case 6, 23, 33, 48 ... Opening part 8 ... RFID
DESCRIPTION OF SYMBOLS 15 ... Photodetection terminal 16 ... Photodetection part 19 ... Front-end | tip part 25, 35 ... Fusion welding reinforcement 29 ... Fusion splicing part 40 ... Optical termination tray

Claims (6)

A state of an optical signal transmitted through the optical transmission path or the optical transmission path, comprising: an optical leakage section that leaks a part of an optical signal propagating through the optical transmission path; and a light detection section that detects the leaked optical signal. in the optical transmission path determination unit for determining,
Before Symbol light leakage portion is shaped to fit to the light detecting portion is configured to be separated and the light detector, a first component having the optical transmission path curved surface for bending the The second component having a shape that fits with the first component as a component,
The light detection unit is configured to be fitted to the light leakage part and separated from the light leakage part, and is fitted to the light leakage part only when the state of the optical transmission path is determined. Then, the first component and the second component are further fitted by the fitting to bend the optical transmission path, thereby leaking a part of the optical signal and leaking the leaked light. An optical transmission line discrimination device for detecting a signal. A state of an optical signal transmitted through the optical transmission path or the optical transmission path, comprising: an optical leakage section that leaks a part of an optical signal propagating through the optical transmission path; and a light detection section that detects the leaked optical signal. in the optical transmission path determination unit for determining,
Before Symbol light leakage portion is shaped to fit to the light detecting portion is configured to be separated and the light detector has at least one connection point to said optical transmission path, wherein from the connection point A part of the optical signal is leaked, and the part of the optical signal is leaked from the bent portion by bending the optical transmission line in the vicinity of the connection point.
The light detection unit is configured to be separated from the light leakage part, and is fitted to the light leakage part, thereby leaking the optical signal leaking from the connection point and the optical signal leaking from the bent part. An optical transmission line discriminating apparatus characterized by detecting the above. The optical transmission path discriminating apparatus according to claim 1 or 2 , wherein at least a part of the coating layer of the bent portion in the light leakage section is removed from the optical transmission path. The optical transmission path determination device according to claim 1, wherein the light leakage unit includes an RFID. The said light leakage part is provided in at least any one of the optical termination | terminus tray or optical termination unit in the optical termination | terminus apparatus installed in the said optical transmission line, The Claim 1 characterized by the above-mentioned. Item 5. The optical transmission line discriminating device according to any one of Item 4 . In an optical transmission line management system for managing an optical fiber line constituting the optical transmission line, the optical transmission line or the optical transmission line is determined by using the optical transmission line determination device according to any one of claims 1 to 5. An optical transmission line management system characterized by discriminating the state of an optical signal transmitted through an optical transmission line, identifying information on the optical transmission line by the RFID, and managing the optical fiber line.

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