CN112558241B - Active optical fiber line with continuously adjustable light spot radius - Google Patents

Abstract

The invention discloses an active optical fiber line with continuously adjustable spot radius, which includes a base, multiple groups of optical fiber lines arranged on the base, and a zoom module correspondingly arranged on the optical fiber line, the zoom module It includes multiple sets of zoom lens assemblies correspondingly arranged on the optical fiber line, a fixed lens assembly correspondingly arranged between the zoom lens assembly and the optical fiber line, a transmission assembly for synchronously adjusting the focal length of multiple sets of the zoom lens assemblies, and a laser The emission source achieves the purpose of synchronous calibration function for multi-channel optical fiber transmission, and realizes variable spot diameter for optical fiber lines with different bandwidths, thereby ensuring maximum transmission efficiency.

Description

An active optical fiber line with continuously adjustable spot radius

technical field

The invention relates to the field of signal transmission, more specifically, it relates to an active optical fiber line with continuously adjustable light spot radius.

Background technique

While we are still immersed in the 4K audio-visual feast, the industry has already begun to make efforts on 8K. In addition to display terminals and video sources, the most important thing is to need a cable that can meet the needs of 8K transmission. Currently The transmission upper limit of HDMI2.0 is 18Gbps, and this data transmission speed cannot meet the needs of 8K transmission.

In order to solve the problem of insufficient bandwidth, there are two solutions for 8K devices: one is to directly upgrade to HDMI2. It meets the requirements of 8K data transmission speed, but the cost of HDMI2.1 transmission cable is very high.

The second is to transmit data through 4 HDMI2.0 transmission cables, and complete the data transmission through 4 HDMI2.0 cables. In the field of signal transmission, the transmitting end converts electrical signals into optical signals through photoelectric sensors, while the receiving end is the opposite process, converting optical signals into electrical signals to restore audio and video signals. In the process of multi-fiber transmission, how to ensure high-quality and synchronous transmission of signals has become a pain point that needs to be solved urgently in this field.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

The purpose of the present invention is to provide an active optical fiber line with continuously adjustable spot radius to achieve the purpose of synchronous calibration function for multi-channel optical fiber transmission.

Above-mentioned technical purpose of the present invention is achieved through the following technical solutions:

An active optical fiber line with continuously adjustable spot radius, which includes a base, multiple groups of optical fiber lines arranged on the base, and a zoom module correspondingly arranged on the optical fiber line, and the zoom module includes multiple groups The zoom lens assembly correspondingly arranged on the optical fiber line, the fixed lens assembly correspondingly arranged between the zoom lens assembly and the optical fiber line, the transmission assembly for synchronously adjusting the focal length of multiple sets of the zoom lens assembly and the laser emission source.

The active optical fiber line with continuously adjustable spot radius, wherein the laser emitting source includes a vertical cavity surface emitting laser arranged at one end of the zoom lens assembly and a laser for emitting the vertical cavity surface emitting laser The laser light is reflected to a mirror within the zoom lens assembly.

The active optical fiber line with continuously adjustable spot radius, wherein the fixed lens assembly, the transmission assembly and the laser emission source are all arranged on a base, and the vertical cavity surface emitting laser patch is arranged on the base Above, the reflector is set at an angle of 45 degrees and is used to convert the vertical light emitted by the vertical cavity surface emitting laser into horizontal light.

The active optical fiber with continuously adjustable spot radius, wherein the zoom lens assembly includes a lens base, a light-incident side fixed lens arranged on the lens base, a first zoom lens and a second zoom lens, the The fixed lens on the light incident side, the first zoom lens and the second zoom lens are arranged in sequence, and the fixed lens assembly includes a fixed lens on the light exit side corresponding to the zoom lens assembly.

The active optical fiber with continuously adjustable spot radius, wherein the zoom lens assembly further includes a cam ring sleeved on the outside of the first zoom lens and the second zoom lens, and the first zoom lens A first positioning button is provided on the second zoom lens, a second positioning button is provided on the second zoom lens, a first sliding groove that is slidably adapted to the first positioning button and spirally arranged on the cam ring and The second positioning button is slidably fitted and is a second sliding groove that is spirally arranged; the spiral direction of the first sliding groove is opposite to that of the second sliding groove, and when the cam rotates, the first zoom lens and the second sliding groove The second zoom lens moves toward each other.

In the active optical fiber with continuously adjustable spot radius, the pitch of the first sliding groove is greater than the pitch of the second sliding groove.

The active optical fiber with continuously adjustable spot radius, wherein a slide bar is set on the lens base, the slide bar is set along the length direction of the lens base, the first zoom lens and the second The two zoom lenses are both slidably connected to the slide bar.

The active optical fiber with continuously adjustable spot radius, wherein a transmission gear is provided on the outer wall of the cam ring, the transmission assembly includes a transmission wheel arranged on one side of the zoom lens assembly, and the transmission The wheel is connected with the transmission gear through a rack belt.

In the active optical fiber with continuously adjustable spot radius, a photoelectric conversion module is further arranged on the base, and a chip of the photoelectric conversion module is integrated on the base.

In the active optical fiber with continuously adjustable spot radius, an electrical signal interface for electrical communication is also provided on the base.

In summary, the present invention has the following beneficial effects:

The present invention sets the zoom lens assembly corresponding to multiple groups of optical fiber lines one by one, and synchronously adjusts the focal length of the zoom lens assembly through the transmission assembly, so as to satisfy the function of synchronous calibration of multi-channel optical fiber transmission; at the same time, for optical fiber lines with different bandwidths, The diameter of the spot can be changed to ensure the maximum efficiency of transmission.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the optical fiber line in this embodiment.

FIG. 2 is a schematic diagram of the overall structure of the zoom module in this embodiment.

FIG. 3 is a schematic diagram of the exploded structure of the zoom lens assembly in this embodiment.

FIG. 4 is a schematic diagram of the assembly structure of the zoom lens assembly in this embodiment.

Fig. 5 is a zoom optical path diagram of the zoom module in this embodiment.

In the figure: 100, base; 200, optical fiber cable; 300, zoom module; 310, zoom lens assembly; 311, lens base; , the first positioning button; 314, the second zoom lens; 3141, the second positioning button; 320, the fixed lens assembly; 321, the light-emitting side fixed lens; 330, the transmission assembly; 331, the transmission wheel; , laser emitting source; 341, vertical cavity surface emitting laser; 342, reflector; 350, cam ring; 351, first sliding groove; 352, second sliding groove; 353, transmission gear; 360, seat body; 400, photoelectricity A conversion module; 500, an electrical signal interface.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, terms such as "installation", "connection", "connection", "fixation" and "setting" should be interpreted in a broad sense, for example, it may be a fixed connection or It is a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be the internal communication of two components or the interaction relationship between two components . Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Embodiment: An active optical fiber line with continuously adjustable spot radius, as shown in Figure 1 and Figure 2, includes a base 100, multiple groups of optical fiber lines 200 arranged on the base 100 and correspondingly arranged on the The zoom module 300 of the optical fiber line 200, the zoom module 300 includes a plurality of sets of zoom lens assemblies 310 corresponding to the optical fiber line 200, and a fixed lens assembly 320 correspondingly arranged between the zoom lens assembly 310 and the optical fiber line 200 , a transmission assembly 330 and a laser emitting source 340 for synchronously adjusting the focal lengths of multiple groups of zoom lens assemblies 310 .

The base 100 is also provided with a photoelectric conversion module 400 , the chip of the photoelectric conversion module 400 is integrated on the base 100 , and the base 100 is also provided with an electrical signal interface 500 for electrical communication.

As shown in FIG. 2 , the laser emitting source 340 includes a vertical cavity surface emitting laser 341 arranged at one end of the zoom lens assembly 310 and is used for reflecting the laser light emitted by the vertical cavity surface emitting laser 341 to the zoom lens assembly 310. Mirror 342 within lens assembly 310 .

The laser beam emitted by the vertical cavity surface emitting laser has not undergone secondary optical path shaping, showing a large divergence angle. Based on the influence of the fiber numerical aperture on the bandwidth at the first point, it is necessary to design a collimating optical system to diverge it The angle becomes smaller. At the same time, because the larger the fiber mode field diameter, the larger the effective area of laser transmission, which is more beneficial to increase the bandwidth. From the above, it is necessary to design a collimating optical system to increase the cross-sectional area of the laser spot. Therefore, the present invention achieves the purpose of optical beam expansion and collimation by setting a zoom module, thereby satisfying the synchronous calibration function of multi-channel optical fiber transmission, as follows.

As shown in FIGS. 2 to 4 , the fixed lens assembly 320 , the transmission assembly 330 and the laser emitting source 340 are all arranged on a base 360 , and the vertical cavity surface emitting laser 341 is patched on the base 360 , the reflector 342 is set at an angle of 45 degrees and is used to convert the vertical light emitted by the vertical cavity surface emitting laser 341 into a horizontal light. Among them, the vertical cavity surface-emitting laser 341 belongs to the SMD component, and the top surface emits laser light, because a reflector 342 needs to be placed and set at 45 degrees to convert vertical light into horizontal light.

The zoom lens assembly 310 includes a lens base 311, a light incident side fixed lens 312 arranged on the lens base 311, a first zoom lens 313 and a second zoom lens 314, the light incident side fixed lens 312, the first The zoom lens 313 and the second zoom lens 314 are arranged in sequence, and the fixed lens assembly 320 includes a fixed lens 321 on the light exit side corresponding to the zoom lens assembly 310 .

Wherein, the direction of the optical path is from left to right in the accompanying drawings of this embodiment. It can be seen from the figure that the laser beam with a divergent angle passes through the zoom lens assembly 310 and the fixed lens assembly 320, and becomes a wide-width collimated beam. Combined with FIG. 5 Show.

The zoom lens assembly 310 also includes a cam ring 350 sleeved on the outside of the first zoom lens 313 and the second zoom lens 314, the first zoom lens 313 is provided with a first positioning button 3131, the The second zoom lens 314 is provided with a second positioning button 3141, and the cam ring 350 is provided with a first sliding groove 351 that is slidably fitted to the first positioning button 3131 and is spirally arranged and is connected with the second positioning button. The button 3141 is slidably adapted to the second sliding groove 352 that is spirally arranged; the spiral direction of the first sliding groove 351 and the second sliding groove 352 is opposite, and when the cam rotates, the first zoom lens 313 and the second sliding groove 352 The second zoom lens 314 moves toward each other.

Wherein, the first zoom lens 313 is provided with three first positioning buttons 3131, and the second zoom lens 314 is also provided with three second positioning buttons 3141, and the first positioning buttons 3131 and the second The positioning buttons 3141 are all cylindrical, so as to ensure smoothness during the sliding process.

During the sliding process of the first zoom lens 313 and the second zoom lens 314 , the light incident side fixed lens 312 and the light exit side fixed lens 321 keep fixed positions. The laser of the existing optical fiber line 200 can only emit light through simple reflection and single-lens collimation, and its output angle is relatively large, which is not conducive to light incident and transmission at the end face of the optical fiber line 200 . The optical path collimation structure designed in this application can effectively control the beam angle within 0.25mrad, which meets the requirement of optical fiber numerical aperture.

The lens base 311 is provided with a slide bar 3111, the slide bar 3111 is arranged along the length direction of the lens base 311, the first zoom lens 313 and the second zoom lens 314 are both slidably connected to the slide Rod 3111.

Wherein, the pitch of the first sliding groove 351 is greater than the pitch of the second sliding groove 352 . During the zooming process, the cam ring 350 rotates clockwise, so that the first zoom lens 313 and the second zoom lens 314 translate under the drive of the first sliding groove 351 and the second sliding groove 352 respectively, and the translation direction is opposite movement, and the second The sliding range of the first zoom lens 313 is greater than the sliding range of the second zoom lens 314 . The specific translation distance and direction are set by the zoom parameters. No specific parameters are given in this embodiment. The specific parameters can be set according to actual needs. Based on the parameter settings of the specific embodiments of the present invention, the zoom factor is 3 times to 10 times.

The laser beam diameter of the existing optical fiber line 200 is basically fixed, which is not conducive to the alignment of the beam and the incident end face during early assembly, and also limits the diameter of its mode field. Therefore, this application designs a zoom system to make the beam diameter smaller. Large multiple changes, according to the actual application situation, the flexible use of the beam diameter for the convenience of assembly, and the stable and high-speed data transmission.

In this embodiment, there are 4 optical fiber lines 200 in total, wherein the function of the transmission assembly 330 is to make the 4 optical fiber lines zoom synchronously. The outer wall of the cam ring 350 is provided with a transmission gear 353. The transmission assembly 330 includes a transmission wheel 331 arranged on one side of the zoom lens assembly 310. Gear 353 is connected. The number of light paths in this application is not limited to 4 light paths, and can be changed at will. It only needs to quantitatively increase or decrease the number of zoom lens assemblies 310, and the distance between the zoom lenses can be uniformly changed through the transmission wheel 331 and the cam ring 350.

In other embodiments of the present invention, the zoom lens assembly can also be replaced by a liquid zoom medium, and its refractive index and its own shape can be changed by changing the electric field conditions. The zoom lens group can also be a non-zoom lens group, and the beam expansion factor can be selected according to actual needs.

In summary, the present invention satisfies the function of synchronous calibration of multi-channel optical fiber transmission by setting zoom lens assemblies corresponding to multiple groups of optical fiber lines one by one, and synchronously adjusting the focal length of the zoom lens assembly through the transmission assembly; at the same time, for different Broadband optical fiber lines enable variable spot diameters to ensure maximum transmission efficiency.

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (8)

1. The utility model provides an active fiber line of facula radius continuously adjustable which characterized in that: the zoom module comprises a plurality of groups of zoom lens components correspondingly arranged on the optical fiber lines, a fixed lens component correspondingly arranged between the zoom lens components and the optical fiber lines, a transmission component used for synchronously adjusting the focal lengths of the plurality of groups of zoom lens components and a laser emission source; the zoom lens assembly comprises a lens base, an incident side fixed lens, a first zoom lens and a second zoom lens, wherein the incident side fixed lens, the first zoom lens and the second zoom lens are arranged on the lens base in sequence;

the zoom lens assembly further comprises a cam ring sleeved outside the first zoom lens and the second zoom lens, a first positioning button is arranged on the first zoom lens, a second positioning button is arranged on the second zoom lens, and a first sliding groove which is in sliding fit with the first positioning button and is spirally arranged and a second sliding groove which is in sliding fit with the second positioning button and is spirally arranged are arranged on the cam ring; the spiral directions of the first sliding groove and the second sliding groove are opposite, when the cam ring rotates, the first zoom lens and the second zoom lens move oppositely, and the diameter of a light spot is variable for optical fiber lines with different bandwidths.

2. The active optical fiber line with continuously adjustable spot radius according to claim 1, wherein: the laser emission source comprises a vertical cavity surface emitting laser arranged at one end of the zoom lens component and a reflector used for reflecting laser emitted by the vertical cavity surface emitting laser into the zoom lens component.

3. The active optical fiber line with continuously adjustable spot radius according to claim 2, wherein: the fixed lens assembly, the transmission assembly and the laser emission source are all arranged on a base body, the vertical cavity surface emitting laser patch is arranged on the base body, and the reflector is arranged at an angle of 45 degrees and is used for converting vertical light rays emitted by the vertical cavity surface emitting laser into horizontal light rays.

4. The active optical fiber line with continuously adjustable spot radius according to claim 1, wherein: the thread pitch of the first sliding groove is larger than that of the second sliding groove.

5. The active optical fiber line with continuously adjustable spot radius according to claim 1, wherein: the zoom lens comprises a lens base and is characterized in that a sliding rod is arranged on the lens base, the sliding rod is arranged along the length direction of the lens base, and the first zoom lens and the second zoom lens are connected to the sliding rod in a sliding mode.

6. The active optical fiber line with continuously adjustable spot radius according to claim 1, wherein: the outer side wall of the cam ring is provided with a transmission gear, the transmission assembly comprises a transmission wheel arranged on one side of the zoom lens assembly, and the transmission wheel is connected with the transmission gear through a rack belt.

7. The active optical fiber line with the continuously adjustable spot radius according to claim 1, wherein: the base is further provided with a photoelectric conversion module, and a chip of the photoelectric conversion module is integrated on the base.

8. The active optical fiber line with the continuously adjustable spot radius according to claim 1, wherein: the base is further provided with an electric signal interface for electric communication.

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