CN110441865B - Method for fixing coated optical fiber reflector - Google Patents
Method for fixing coated optical fiber reflector Download PDFInfo
- Publication number
- CN110441865B CN110441865B CN201910736479.8A CN201910736479A CN110441865B CN 110441865 B CN110441865 B CN 110441865B CN 201910736479 A CN201910736479 A CN 201910736479A CN 110441865 B CN110441865 B CN 110441865B
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- Prior art keywords
- groove
- optical fiber
- coated optical
- gel layer
- gel
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000010453 quartz Substances 0.000 claims abstract description 20
- 238000004806 packaging method and process Methods 0.000 claims abstract description 19
- 230000008602 contraction Effects 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Couplings Of Light Guides (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
The invention belongs to the technical field of reflector packaging, and discloses a method for fixing a coated optical fiber reflector, which comprises the following steps: arranging a quartz packaging piece with a through groove, and enabling a notch of the through groove to face upwards; injecting gel into the through groove to form a first gel layer, wherein the outer side surface of the first gel layer facing the notch of the through groove is a supporting plane, so that the supporting plane and the notch of the through groove are arranged at intervals; one end of the coated optical fiber is inserted into the through groove, so that the part of the coated optical fiber inserted into the through groove extends along the through direction of the through groove and is erected on the supporting plane; and injecting gel into the through groove to form a second gel layer, so that the second gel layer encapsulates part of the coated optical fiber in the through groove. In the invention, the quartz packaging piece can release the deformation of the packaging gel caused by thermal expansion and cold contraction through the single-side opening of the through groove.
Description
Technical Field
The invention relates to the technical field of reflector packaging, in particular to a method for fixing a coated optical fiber reflector.
Background
The reflective optical fiber sensor has the characteristics of excellent electrical insulation performance, radiation resistance, frequency response, safety and the like. The reflector is an optical device forming one core of the sensor, and the quality of the performance of the reflector directly influences the normal work and application of the sensor. The existing reflective optical fiber sensor usually adopts a coated optical fiber, namely, a coating is applied to the output end of the optical fiber, in the reflector, the coating structure is easily affected by the damp and hot environment, so that the reflectivity is changed, the performance of the reflector is affected, and the performance and the strength of the reflector are ensured by packaging.
In order to ensure the performance and strength of the reflector, the packaging structure needs to meet certain use requirements: the reflectivity loss of the reflective mirror needs to be controlled within a safe value under the environment temperature change, the reflectivity reduction caused by the mirror corrosion in the outdoor environment can be reliably avoided for a long time, and meanwhile, under the environment of the temperature change, the measurement error caused by the extra stress generated on the mirror by the expansion or contraction of the packaging material needs to be avoided.
When the coated optical fiber is fixed in the existing packaging structure, the coated optical fiber is usually packaged in a quartz glass tube, and in order to ensure the reliability of the fixation, the gel packaging length needs to be more than 25mm, and because the packaging gel is sealed in the tube cavity of the quartz glass tube, the gel can flow along the length direction of the quartz glass tube when expanding with heat and contracting with cold, so that axial and radial stress is generated on the coated optical fiber, and the measuring result and the service life of the reflection type optical fiber sensor are influenced.
Disclosure of Invention
The invention aims to provide a method for fixing a coated optical fiber reflector, which can safely and reliably fix a coated optical fiber and avoid the influence of thermal expansion and cold contraction deformation of packaging gel on the coated optical fiber reflector.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for fixing a coated optical fiber reflector comprises the following steps:
arranging a quartz packaging piece with a through groove, and enabling a notch of the through groove to face upwards;
injecting gel into the through groove to form a first gel layer, wherein the outer side surface of the first gel layer facing the notch of the through groove is a supporting plane, so that the supporting plane and the notch of the through groove are arranged at intervals;
one end of the coated optical fiber is inserted into the through groove, so that the part of the coated optical fiber inserted into the through groove extends along the through direction of the through groove and is erected on the supporting plane;
and injecting gel into the through groove to form a second gel layer, so that the second gel layer encapsulates part of the coated optical fiber in the through groove.
Preferably, the support plane is formed by extending a support curve along the penetrating direction of the penetrating groove, a support point is arranged on the support curve, the support point and two side walls of the penetrating groove are arranged at intervals, and the height of the support curve from the support point to the side walls of the penetrating groove is gradually increased.
Preferably, the support points are equidistant from both side walls of the through groove.
Preferably, the support curve is an arc.
Preferably, the outer side surface of the second gel layer is flush with the notch of the through groove.
Preferably, the quartz package includes an elongated support portion and two elongated side arms connected to the support portion, the two side arms are spaced apart from each other in parallel, and the through groove is formed between the two side arms.
Preferably, an end surface of the side arm, which is away from one end of the support portion, is an introduction surface, the introduction surface is formed by an introduction curve extending in a penetrating direction of the through groove, and the introduction surface smoothly transitions from an outer side surface of the side arm, which is away from the through groove, to an inner side surface of the side arm, which is toward the through groove.
Preferably, the outer side surface and the inner side surface of the side arm are parallel to each other.
Preferably, the introduction curve is a semicircular arc.
Preferably, the difference between the thermal expansion rates of the quartz package and the coated optical fiber is smaller than a set value.
The invention has the beneficial effects that:
before encapsulating the coated optical fiber, firstly, a first gel layer is formed in the through groove, the coated optical fiber can be effectively prevented from falling off and being damaged at the corners of the optical fiber due to the contact with a quartz packaging piece, a second gel layer is formed on the first gel layer and the coated optical fiber, the coated optical fiber is clamped and wrapped by the first gel layer and the second gel layer, the coated optical fiber can be safely and reliably fixed, after the fixing is completed, the quartz packaging piece can release the deformation generated when the packaging gel expands with heat and contracts with cold through the single-side opening of the through groove, the phenomenon that the coating film is peeled off from the optical fiber body due to the fact that extra pressure is generated on the coated optical fiber is avoided, and therefore the measuring result and the service life of the optical fiber sensor can be guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a quartz package provided in a method for fixing a coated optical fiber reflector according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram illustrating a coated optical fiber mounted on a first gel layer in a method for fixing a coated optical fiber reflector according to an embodiment of the present invention;
FIG. 3 is a schematic end view of the structure of FIG. 2;
FIG. 4 is a schematic structural diagram of a second gel layer formed in the method for fixing a coated optical fiber reflector according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of fig. 4.
In the figure:
1. a quartz package; 10. a groove is penetrated; 11. a support portion; 12. a side arm; 121. a lead-in surface;
2. a first gel layer; 21. a support plane;
3. coating the optical fiber;
4. a second gel layer.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 5, the present invention provides a method for fixing a coated optical fiber reflector, comprising the following steps:
step one, arranging the quartz packaging piece 1 with the through groove 10, and enabling the notch of the through groove 10 to face upwards.
In this step, the selected quartz package 1 is made of quartz glass material, and the difference between the thermal expansion rates of the quartz package 1 and the coated optical fiber 3 is smaller than a predetermined value, in this embodiment, the thermal expansion rates of the quartz package 1 and the coated optical fiber 3 are identical and are both 7 ppm/k.
And step two, injecting gel into the through groove 10 to form a first gel layer 2, wherein the outer side surface of the first gel layer 2 facing the notch of the through groove 10 is a supporting plane 21, so that the supporting plane 21 and the notch of the through groove 10 are arranged at intervals.
And step three, extending one end of the coated optical fiber 3 into the through groove 10, so that the part of the coated optical fiber 3 extending into the through groove 10 extends along the through direction of the through groove 10 and is erected on the supporting plane 21.
In this step, the coating material of the coated optical fiber 3 is used depending on the wavelength of light propagating in the optical fiber, and aluminum or gold may be used for the infrared band.
And step four, injecting gel into the through groove 10 to form a second gel layer 4, so that the second gel layer 4 encapsulates part of the coated optical fiber 3 in the through groove 10.
In the second and fourth steps, the requirements of the gel injected into the through groove 10 are as follows: viscosity is not more than 1000cp, hardness is not more than 150g needle punching method, and linear thermal expansion coefficient is less than 500 ppm/k.
According to the invention, before the coated optical fiber 3 is packaged, the first gel layer 2 is formed in the through groove 10, so that the coated optical fiber 3 can be effectively prevented from being contacted with the quartz package part 1 to cause coating film falling and optical fiber corner damage, the second gel layer 4 is formed on the first gel layer 2 and the coated optical fiber 3, the coated optical fiber is clamped and wrapped by the first gel layer 2 and the second gel layer 4, so that the coated optical fiber 3 can be safely and reliably fixed, after the fixing is finished, the quartz package part 1 can release deformation generated by the package gel when the package gel expands with heat and contracts with cold through the one-side opening of the through groove 10, so that the coating film on the coated optical fiber 3 is prevented from being peeled from the optical fiber body due to extra pressure generated on the coating film, and the measuring result and the service life of the optical fiber sensor can be ensured.
Specifically, the support plane 21 is formed by extending a support curve along the penetrating direction of the through groove 10, the support curve is provided with support points, the support points and two side walls of the through groove 10 are arranged at intervals, and the height of the support curve from the support points to the side walls of the through groove 10 is gradually increased. Due to the arrangement, the coated optical fiber 3 can be safely and reliably positioned at the supporting point through the gravity of the coated optical fiber after extending into the through groove 10.
More specifically, the support points are equidistant from both sidewalls of the through groove 10, and the support curve is an arc. The arrangement makes the support plane 21 smooth and reliable in structure, thereby making the bearing of the coated optical fiber 3 safer.
In this embodiment, the outer side of the second gel layer 4 is flush with the notch of the through-going recess 10.
Specifically, the quartz package 1 includes an elongated support 11 and two elongated side arms 12 connected to the support 11, wherein the two side arms 12 are disposed in parallel and spaced apart from each other, and a through groove 10 is formed between the two side arms 12.
More specifically, the end surface of the side arm 12 away from the end of the support portion 11 is an introduction surface 121, the introduction surface 121 is formed by an introduction curve extending in the penetrating direction of the through groove 10, and the introduction surface 121 smoothly transitions from the outer side surface of the side arm 12 away from the through groove 10 to the inner side surface of the side arm 12 toward the through groove 10. The arrangement avoids the collision of the side arm 12 to the coated optical fiber 3.
In the present embodiment, the outer side surface and the inner side surface of the side arm 12 are parallel to each other, and the introduction curve is a semicircular arc. The arrangement enables the quartz package 1 to more safely package the coated optical fiber 3.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A method for fixing a coated optical fiber reflector is characterized by comprising the following steps:
arranging a quartz packaging piece (1) with a through groove (10) and enabling the notch of the through groove (10) to face upwards;
gel is injected into the through groove (10) to form a first gel layer (2), and the outer side surface, facing the notch of the through groove (10), of the first gel layer (2) is a supporting plane (21), so that the supporting plane (21) and the notch of the through groove (10) are arranged at intervals;
one end of the coated optical fiber (3) extends into the through groove (10), so that the part of the coated optical fiber (3) extending into the through groove (10) extends along the through direction of the through groove (10) and is erected on the supporting plane (21);
injecting gel into the through groove (10) to form a second gel layer (4), so that the second gel layer (4) encapsulates part of the coated optical fiber (3) in the through groove (10);
the one-side opening of the through groove can release the deformation of the packaging gel caused by expansion with heat and contraction with cold;
the quartz packaging piece (1) comprises a strip-shaped supporting part (11) and two strip-shaped side arms (12) connected to the supporting part (11), the two side arms (12) are arranged in parallel at intervals, and the through groove (10) is formed between the two side arms (12);
the end face of the side arm (12) far away from one end of the support part (11) is an introduction face (121), the introduction face (121) is formed by extending an introduction curve along the through direction of the through groove (10), and the introduction face (121) is in smooth transition from the outer side face of the side arm (12) far away from the through groove (10) to the inner side face of the side arm (12) towards the through groove (10);
the outer side surface and the inner side surface of the side arm (12) are parallel to each other.
2. The method of claim 1, wherein the support plane (21) is formed by a support curve extending in a penetrating direction of the through groove (10), the support curve having a support point spaced apart from both sidewalls of the through groove (10), the support curve having a height gradually increasing from the support point to the sidewalls of the through groove (10).
3. The method of claim 2, wherein the support points are spaced equally from the two side walls of the through groove (10).
4. The method of claim 2, wherein the support curve is an arc.
5. The method for fixing a coated optical fiber reflector according to claim 1, wherein the outer side surface of the second gel layer (4) is flush with the opening of the through groove (10).
6. The method of claim 1, wherein the lead-in curve is a semi-circular arc.
7. The method of any of claims 1-6, wherein the difference in thermal expansion rates between the quartz package (1) and the coated optical fiber (3) is less than a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736479.8A CN110441865B (en) | 2019-08-09 | 2019-08-09 | Method for fixing coated optical fiber reflector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736479.8A CN110441865B (en) | 2019-08-09 | 2019-08-09 | Method for fixing coated optical fiber reflector |
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| Publication Number | Publication Date |
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| CN110441865A CN110441865A (en) | 2019-11-12 |
| CN110441865B true CN110441865B (en) | 2021-08-03 |
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| CN201910736479.8A Active CN110441865B (en) | 2019-08-09 | 2019-08-09 | Method for fixing coated optical fiber reflector |
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| CN114993194A (en) * | 2022-05-26 | 2022-09-02 | 合肥正阳光电科技有限责任公司 | Gap measuring device under extreme temperature condition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090338A (en) * | 2014-07-31 | 2014-10-08 | 光库通讯(珠海)有限公司 | Coupler and manufacturing method thereof |
| CN104950395A (en) * | 2014-03-31 | 2015-09-30 | 北京自动化控制设备研究所 | Optical fiber end surface reflecting mirror packaging method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4050402B2 (en) * | 1998-08-25 | 2008-02-20 | 日本オプネクスト株式会社 | Optoelectronic device and manufacturing method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950395A (en) * | 2014-03-31 | 2015-09-30 | 北京自动化控制设备研究所 | Optical fiber end surface reflecting mirror packaging method |
| CN104090338A (en) * | 2014-07-31 | 2014-10-08 | 光库通讯(珠海)有限公司 | Coupler and manufacturing method thereof |
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