CN117375708B - Optical fiber coupling-based spatial two-dimensional deflection angle measurement and communication integrated implementation method - Google Patents
Optical fiber coupling-based spatial two-dimensional deflection angle measurement and communication integrated implementation method Download PDFInfo
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- CN117375708B CN117375708B CN202311260347.5A CN202311260347A CN117375708B CN 117375708 B CN117375708 B CN 117375708B CN 202311260347 A CN202311260347 A CN 202311260347A CN 117375708 B CN117375708 B CN 117375708B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 167
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- H—ELECTRICITY
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
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- H—ELECTRICITY
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- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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Abstract
The invention discloses an integrated implementation method of space two-dimensional deflection angle measurement communication based on optical fiber coupling, which comprises the steps of S1, grinding and polishing a single-mode fiber into a rectangular single-mode fiber, S2, plating a reflecting film on a grinding and polishing surface of the rectangular single-mode fiber, S3, preparing an optical fiber four-quadrant structure, S4, searching a coordinate point of maximum coupling efficiency of space light and the optical fiber by adopting a peak searching algorithm, marking the coordinate point as an initial coordinate, S5, continuously receiving light intensity energy of a light spot by the optical fiber four-quadrant structure, transmitting the light intensity energy to a data processing center, and sending information comprising communication information, the relative position of the light spot and coupling efficiency to an upper computer after the light intensity data received by the optical fiber four-quadrant structure are obtained by the data processing center, and S6, dynamically adjusting the posture of a quick reflector to ensure that the central position of the light spot is positioned at the initial coordinate; the invention has high coupling efficiency, high accuracy, strong stability, small volume, light weight and low cost of the light intensity data collected under electromagnetic interference, and provides a new method for the field of space optical communication.
Description
Technical Field
The invention relates to a method for realizing integration of space two-dimensional deflection angle measurement and communication, in particular to a method for realizing integration of space two-dimensional deflection angle measurement and communication based on optical fiber coupling.
Background
The wireless optical communication is a communication mode for carrying out data transmission by taking light waves as carriers, wherein the coupling of signal light and light from free space into optical fibers is an important link of the wireless optical communication, the coupling efficiency of the optical fibers is an important factor for restricting the wireless optical communication, and the coupling efficiency of the optical fibers can be seriously affected by the factors such as external atmospheric turbulence, random angle jitter, wave front distortion and the like due to small fiber core diameter of single-mode optical fibers. Therefore, there is increasing interest in how to increase the efficiency of spatial light coupling fibers.
If the space light is directly coupled with the single-mode fiber, external factors such as atmospheric turbulence, random angle jitter, wavefront deformation and the like can seriously influence the coupling efficiency of the single-mode fiber, so that serious problems such as the degradation of the optical communication quality, chain breakage and the like are caused. Although multimode optical fibers can effectively resist atmospheric turbulence and improve coupling efficiency due to a large core diameter, high-speed communication cannot be achieved due to a series of problems such as inter-mode crosstalk, modal dispersion, and the like.
In order to alleviate the interference of external factors such as atmospheric turbulence and random angle jitter, the existing spatial light and optical fiber coupling method mainly improves the coupling efficiency of a single-mode fiber through self-adaptive equipment such as a fast reflector, a phase controller and the like and algorithm optimization, but the coupling efficiency of the optical fiber is difficult to further improve because the fiber core position of the single-mode fiber cannot be determined.
At present, although a method for positioning an optical fiber by using four quadrants exists, the existing four quadrants are all formed by photoelectric detectors, the light intensity irradiated to the surface of the detector needs to be converted into corresponding voltage signals, the process is easy to be subjected to electromagnetic interference, and the probe is oversized and is not suitable for being applied to precision tests. In summary, a method with strong anti-interference capability and high accuracy for rapidly positioning the optical fiber position is needed at present, so the invention provides a method for integrating space two-dimensional declination measurement and communication based on optical fiber coupling.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides an integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling, and provides and prepares an optical fiber type four-quadrant structure by combining the characteristics of optical fibers to further improve and stabilize the coupling efficiency of spatial light and the optical fibers, improve the quality and stability of spatial light communication, reduce the volume of an optical communication terminal, simplify the positioning process at the maximum coupling efficiency and improve the external interference resistance, thereby realizing the integration of spatial two-position deflection angle measurement and communication.
In order to solve the technical problems, the invention adopts the following technical scheme: a spatial two-dimensional deflection angle measurement communication integrated implementation method based on optical fiber coupling comprises the following steps:
s1, grinding and polishing a single-mode fiber into a rectangular single-mode fiber, and observing the end face of the rectangular single-mode fiber by using a high-precision CCD camera to confirm the size of the fiber and the integrity of a fiber core;
s2, plating a reflecting film on the polished surface of the rectangular single-mode fiber;
s3, adopting an adaptive customizing device to fixedly adhere four rectangular single-mode fibers operated in the step S2, and cutting the four rectangular single-mode fibers by an optical fiber cutting knife to prepare an integrated optical fiber type four-quadrant structure for measuring and communicating space two-position deflection angles;
s4, arranging an optical fiber type four-quadrant structure on a space light and optical fiber coupling device, searching a coordinate point of maximum coupling efficiency of the space light and the optical fiber by adopting a peak searching algorithm, and marking the coordinate point as an initial coordinate;
s5, continuously receiving light intensity energy of the light spots by the optical fiber type four-quadrant structure, transmitting the light intensity energy to a data processing center, and transmitting the light intensity data received by the optical fiber type four-quadrant structure to an upper computer by the data processing center after obtaining the light intensity data received by the optical fiber type four-quadrant structure, wherein the light intensity data comprises communication information, the relative positions of the light spots and coupling efficiency;
s6, when the light spot deviates from a preset initial position, the data processing center calculates the central position of the current light spot according to the light intensity and the formula received by the current optical fiber type four-quadrant structure, and adjusts the posture of the quick reflection mirror to ensure that the central position of the light spot is located at the initial coordinate so as to ensure the maximum space optical coupling efficiency and the stability of optical communication.
Further, the cladding of the single mode optical fiber was 125 μm and the core was 8.9 μm.
Further, the specific operation of S1 is as follows:
and (3) adhering the single-mode fiber with an adaptive capillary tube marked with a mark at intervals of 90 degrees, fixing the adhered single-mode fiber on a polishing machine, polishing one side of the single-mode fiber, rotating the single-mode fiber clockwise by 90 degrees according to the mark on the capillary tube, polishing again, and rotating for one circle to obtain the rectangular single-mode fiber with the side length of 15+/-0.5 mu m.
Further, the specific operation of S3 is as follows:
firstly, fixing the unground parts of four rectangular single-mode fibers together by using an adaptive customizing device;
secondly, fixing the polished part in a four-quadrant mode by utilizing a capillary tube;
thirdly, adhering the fixed four rectangular single-mode fibers;
and finally, arranging the structure after adhesion preparation on an optical fiber cutting knife, and cutting an optical fiber by using the optical fiber cutting knife, so as to obtain the integrated optical fiber type four-quadrant structure based on optical fiber coupling space two-position deflection angle measurement and communication.
Further, the optical fiber type four-quadrant structure comprises a first rectangular single mode optical fiber, a second rectangular single mode optical fiber, a third rectangular single mode optical fiber and a fourth rectangular single mode optical fiber.
Further, the space light and optical fiber coupling device comprises a receiving antenna for receiving light signals, a converging lens, a quick reflection mirror, an optical fiber type four-quadrant structure, a data processing center and an upper computer, wherein the converging lens is positioned at the lower stage of the transmission of the receiving antenna and used for converging light received by the receiving antenna into light spots, the quick reflection mirror is positioned at the lower stage of the transmission of the converging lens and used for adjusting the positions of the light spots, the optical fiber type four-quadrant structure is positioned at the lower stage of the transmission of the quick reflection mirror and used for receiving the light signals and measuring the positions of the light spots, the data processing center is positioned at the lower stage of the transmission of the optical fiber type four-quadrant structure and used for processing light intensity data received by the optical fiber type four-quadrant structure, and the upper computer is positioned at the lower stage of the transmission of the data processing center.
Further, the data processing center judges the position of the light spot according to the light intensity data, and when the light spot is judged to deviate from the initial positioning, the coordinates of the light spot are adjusted through the quick reflection mirror to be kept at the initial position.
Further, the upper computer receives light spot position data, coupling efficiency and light intensity data received by the optical fiber type four-quadrant structure from the data processing center.
Further, the calculation formula for calculating the center position of the light spot in S6 is:
wherein x and y are relative distances between the center of the light spot and the center of the optical fiber type four-quadrant structure in the horizontal and vertical directions; ei (i=1, 2,3, 4) is the received spot energy for each quadrant; ex is the bias light intensity of the four-quadrant detector in the horizontal direction; ey is the bias light intensity of the four-quadrant detector in the vertical direction.
The invention discloses an integrated implementation method of space two-dimensional deflection angle measurement communication based on optical fiber coupling, which comprises the steps of deeply processing a single-mode fiber by using a polishing machine to obtain four rectangular single-mode fibers, fixedly adhering and solidifying the four rectangular single-mode fibers, and cutting the optical fibers by using an optical fiber cutting knife to obtain an optical fiber type four-quadrant detector;
moreover, the optical fiber type four-quadrant detector can detect the position of a light spot relative to the center of the four quadrants, and transmits the collected light intensity energy to the data processing center through the optical fibers, the data processing center collects the light intensity received by the four optical fibers, calculates the position coordinates of the light spot, couples the light energy received by the four quadrants, processes the information of optical communication, and presents related data on an upper computer, and compared with the existing spatial light and optical fiber coupling method, the optical fiber type four-quadrant detector has the following advantages:
1) Compared with a photosensitive four-quadrant, the method does not need to consider the influence of a dead zone on the four-quadrant detection performance, and the coordinate of the center of the light spot can be calculated by detecting the light intensity received by each optical fiber, so that the maximum coupling efficiency of the space light and the optical fiber can be rapidly positioned. In addition, due to the characteristics of the optical fiber, the invention can effectively resist electromagnetic interference and ensure the accuracy of light intensity data acquired in an electromagnetic interference environment.
2) The optical fiber type four-quadrant can detect the position of a micron-sized light spot, has high reliability and strong stability, realizes high-precision positioning of the maximum space light and the position of the optical fiber, effectively improves the stability and reliability of optical communication, and provides a new method for further improving and stabilizing the coupling efficiency of the space light and the optical fiber.
3) The invention has small volume, light weight and low cost, does not need complex structure to adjust the position of the light spot, has no obvious influence on the whole quality and volume of the optical communication terminal, accords with the development requirements of miniaturization and light weight of the optical communication terminal, really solves the problems of low coupling efficiency and stability of space light and single-mode optical fibers caused by small fiber core diameter of the single-mode optical fibers, and provides a new method for the field of space optical communication.
Drawings
Fig. 1 is a schematic diagram of a rectangular single mode fiber of the present invention.
Fig. 2 is an end face of an optical fiber type four-quadrant detector of the present invention.
Fig. 3 is a schematic diagram of an optical fiber type four-quadrant structure of the present invention.
Fig. 4 is a spatial light and fiber optic coupling device of the present invention.
Fig. 5 is a schematic diagram of the optical fiber type four-quadrant positioning principle of the present invention.
In the figure: 1. a fiber core; 2. a cladding layer; 3. a first rectangular single mode optical fiber; 4. a second rectangular single mode optical fiber; 5. a third rectangular single mode optical fiber; 6. a fourth rectangular single mode optical fiber; 7. a receiving antenna; 8. a converging lens; 9. a quick reflection mirror; 10. an optical fiber type four-quadrant structure; 11. a data processing center; 12. an upper computer; 13. light spots.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1-5 together, the embodiment relates to a spatial two-dimensional deflection angle measurement communication integrated implementation method based on optical fiber coupling, which comprises the following steps:
s1, grinding and polishing the single-mode fiber into a rectangular single-mode fiber shown in FIG. 1, and observing the end face of the rectangular single-mode fiber by using a high-precision CCD camera to confirm the size of the fiber and the integrity of the fiber core 1.
Preferably, as shown in FIG. 1, the cladding 2 of a single mode fiber is 125 μm and the core 1 is 8.9 μm.
Specifically, because the diameter of the single-mode fiber is small, the single-mode fiber is adhered to an adaptive capillary tube marked with a mark at intervals of 90 degrees, the adhered single-mode fiber is fixed on a polishing machine and polished on one side of the polishing machine, in the process, the preparation size of the single-mode fiber is controlled by controlling the polishing time of the polishing machine, the end face of the single-mode fiber is observed by a measuring instrument after the polishing on the side is finished to ensure the polished size, and then the single-mode fiber is rotated clockwise by 90 degrees according to the mark on the capillary tube and polished again, and a rectangular single-mode fiber with the side length of 15+/-0.5 mu m is obtained after rotating for one circle.
S2, plating a reflecting film on the polished surface of the rectangular single-mode fiber.
S3, adopting an adaptive customizing device to fixedly adhere four rectangular single-mode optical fibers operated in the step S2, and cutting the four rectangular single-mode optical fibers by an optical fiber cutting knife to prepare the integrated optical fiber type four-quadrant structure 10 for measuring and communicating the space two-position deflection angle.
Specifically, firstly, the parts of four rectangular single-mode optical fibers which are not polished are fixed together by using an adaptive customizing device; secondly, fixing the polished part in a four-quadrant mode by utilizing a capillary tube; thirdly, adhering the fixed four rectangular single-mode fibers; finally, the structure after adhesion preparation is arranged on an optical fiber cutting knife, and an optical fiber is cut by the optical fiber cutting knife to ensure the smoothness of the end face of the optical fiber, so that the integrated optical fiber type four-quadrant structure 10 based on optical fiber coupling space two-position deflection angle measurement and communication is obtained.
The optical fiber type four-quadrant structure 10 comprises a first rectangular single-mode optical fiber 3, a second rectangular single-mode optical fiber 4, a third rectangular single-mode optical fiber 5 and a fourth rectangular single-mode optical fiber 6, and it can be understood that as can be seen from the end face of the optical fiber type four-quadrant detector shown in fig. 2, the optical fiber type four-quadrant detector is composed of four rectangular single-mode optical fibers.
So far, as shown in fig. 3, in the optical fiber type four-quadrant structure 10, the mode field diameter of the fundamental mode of the fiber core of the single-mode fiber is 10.5±1 μm, in order to reduce the inter-mode crosstalk between the fiber cores of four rectangular single-mode fibers, the distance between the fiber cores is at least 15 μm, and besides, the reflective film plated on the rectangular single-mode fiber can not only ensure that the mode of each quadrant does not interfere with other quadrants, but also can furthest reserve the light energy received by each quadrant.
S4, arranging the optical fiber type four-quadrant structure 10 on a space light and optical fiber coupling device, searching a coordinate point of maximum coupling efficiency of the space light and the optical fiber by adopting a peak searching algorithm, and marking the coordinate point as an initial coordinate.
In this embodiment, as shown in fig. 4, the spatial light and optical fiber coupling device includes a receiving antenna 7 for receiving light signals, a converging lens 8 located at a lower stage of the receiving antenna 7 for converging light received by the receiving antenna into light spots, a quick reflection mirror 9 located at a lower stage of the converging lens 8 for adjusting positions of the light spots, an optical fiber type four-quadrant structure 10 located at a lower stage of the quick reflection mirror 9 for receiving the light signals and measuring positions of the light spots, a data processing center 11 located at a lower stage of the optical fiber type four-quadrant structure 10 for processing light intensity data received by the optical fiber type four-quadrant structure, and an upper computer 12 located at a lower stage of the data processing center 11.
The specific operation of this embodiment is as follows:
in optical communications, when an optical signal is aimed, captured, tracked, and linked;
firstly, receiving an optical signal through a receiving antenna 7, converging the optical signal into a light spot 13 through a converging lens 8, and irradiating the light spot 13 onto a quick reflection mirror 9, wherein the quick reflection mirror 9 adjusts the light spot 13 onto the end face of an optical fiber type four-quadrant structure 10, and the light spot size needs to cover a first rectangular single-mode optical fiber 3, a second rectangular single-mode optical fiber 4, a third rectangular single-mode optical fiber 5 and a fourth rectangular single-mode optical fiber 6;
secondly, the peak searching algorithm is adopted to enable the quick reflection mirror 9 to continuously adjust the position of the light spot 13 to scan the end face of the optical fiber type four-quadrant, the light spot 13 coordinate point with the maximum space light and optical fiber coupling efficiency is obtained through the peak searching algorithm and is set as an initial coordinate, the light intensity received by the current four-quadrant is recorded as the initial intensity, and the peak searching algorithm is the prior art and is not described.
S5, continuously receiving light intensity energy of the light spots by the optical fiber type four-quadrant structure 10, transmitting the light intensity energy to the data processing center 11, and transmitting the light intensity data received by the optical fiber type four-quadrant structure 10 to the upper computer 12 after the data processing center 11 obtains the light intensity data, wherein the light intensity data comprises communication information, the relative positions of the light spots and coupling efficiency.
Preferably, the data processing center 11 determines the position of the light spot 13 according to the light intensity data, and when it is determined that the light spot 13 is offset from the initial positioning, the coordinates of the light spot 13 are adjusted by the quick mirror 9 to be maintained at the initial position.
Preferably, the upper computer 12 receives the light intensity data including the position data of the light spot 13 from the data processing center 11, the coupling efficiency and the optical fiber type four-quadrant structure 10.
S6, when the light spot 13 deviates from a preset initial position, the data processing center 11 calculates the central position of the current light spot 13 according to the light intensity and the formula received by the current optical fiber type four-quadrant structure 10, and adjusts the posture of the quick reflector 9 to ensure that the central position of the light spot 13 is located at the initial coordinate so as to ensure the maximum space optical coupling efficiency and the stability of optical communication.
The calculation formula for calculating the center position of the spot 13 is:
wherein x and y are relative distances between the center of the light spot and the center of the optical fiber type four-quadrant structure in the horizontal and vertical directions; ei (i=1, 2,3, 4) is the received spot energy for each quadrant; ex is the bias light intensity of the four-quadrant detector in the horizontal direction; ey is the bias light intensity of the four-quadrant detector in the vertical direction;
as can be seen from equations (1) and (2), when the light intensities received by the four quadrants are equal, the center of the spot 13 is at the center of the fiber optic four quadrant detector.
Based on the above steps, the optical fiber type four-quadrant light spot positioning principle is shown in fig. 5, and the size of the light spot 13 is an inscribed circle of four quadrants.
In this way, the integrated implementation method of the spatial two-dimensional deflection angle measurement communication based on optical fiber coupling utilizes a polishing machine to carry out deep processing on a single-mode fiber to obtain four rectangular single-mode fibers, and after the four rectangular single-mode fibers are fixedly adhered and solidified, an optical fiber cutter is used for cutting the optical fibers to obtain the optical fiber type four-quadrant detector;
moreover, the optical fiber type four-quadrant detector can detect the position of a light spot relative to the center of the four quadrants, and transmits the collected light intensity energy to the data processing center through the optical fibers, the data processing center collects the light intensity received by the four optical fibers, calculates the position coordinates of the light spot, couples the light energy received by the four quadrants, processes the information of optical communication, and presents related data on an upper computer, and compared with the existing spatial light and optical fiber coupling method, the optical fiber type four-quadrant detector has the following advantages:
1) Compared with a photosensitive four-quadrant, the method does not need to consider the influence of a dead zone on the four-quadrant detection performance, and the coordinate of the center of the light spot can be calculated by detecting the light intensity received by each optical fiber, so that the maximum coupling efficiency of the space light and the optical fiber can be rapidly positioned. In addition, due to the characteristics of the optical fiber, the invention can effectively resist electromagnetic interference and ensure the accuracy of light intensity data acquired in an electromagnetic interference environment.
2) The optical fiber type four-quadrant can detect the position of a micron-sized light spot, has high reliability and strong stability, realizes high-precision positioning of the maximum space light and the position of the optical fiber, effectively improves the stability and reliability of optical communication, and provides a new method for further improving and stabilizing the coupling efficiency of the space light and the optical fiber.
3) The invention has small volume, light weight and low cost, does not need complex structure to adjust the position of the light spot, has no obvious influence on the whole quality and volume of the optical communication terminal, accords with the development requirements of miniaturization and light weight of the optical communication terminal, really solves the problems of low coupling efficiency and stability of space light and single-mode optical fibers caused by small fiber core diameter of the single-mode optical fibers, and provides a new method for the field of space optical communication.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (8)
1. The integrated implementation method for spatial two-dimensional deflection angle measurement and communication based on optical fiber coupling is characterized by comprising the following steps:
s1, grinding and polishing a single-mode fiber into a rectangular single-mode fiber, and observing the end face of the rectangular single-mode fiber by using a high-precision CCD camera to confirm the size of the fiber and the integrity of a fiber core;
s2, plating a reflecting film on the polished surface of the rectangular single-mode fiber;
s3, adopting an adaptive customizing device to fixedly adhere four rectangular single-mode fibers operated in the step S2, and cutting the four rectangular single-mode fibers by an optical fiber cutting knife to prepare an integrated optical fiber type four-quadrant structure for measuring and communicating space two-position deflection angles;
s4, arranging the optical fiber type four-quadrant structure on a space light and optical fiber coupling device, adopting a peak searching algorithm to search a coordinate point of the maximum coupling efficiency of the space light and the optical fiber, marking the coordinate point as an initial coordinate,
the space light and optical fiber coupling device comprises a receiving antenna for receiving light signals, a converging lens positioned at a lower transmitting stage of the receiving antenna for converging light received by the receiving antenna into light spots, a quick reflection mirror positioned at a lower transmitting stage of the converging lens for adjusting the positions of the light spots, an optical fiber type four-quadrant structure positioned at the lower transmitting stage of the quick reflection mirror for receiving the light signals and measuring the positions of the light spots, a data processing center positioned at the lower transmitting stage of the optical fiber type four-quadrant structure for processing light intensity data received by the optical fiber type four-quadrant structure, and an upper computer positioned at the lower transmitting stage of the data processing center;
s5, continuously receiving light intensity energy of the light spots by the optical fiber type four-quadrant structure, transmitting the light intensity energy to a data processing center, and transmitting the light intensity data received by the optical fiber type four-quadrant structure to an upper computer by the data processing center after obtaining the light intensity data received by the optical fiber type four-quadrant structure, wherein the light intensity data comprises communication information, the relative positions of the light spots and coupling efficiency;
s6, when the light spot deviates from a preset initial position, the data processing center calculates the central position of the current light spot according to the light intensity and the formula received by the current optical fiber type four-quadrant structure, and adjusts the posture of the quick reflection mirror to ensure that the central position of the light spot is located at the initial coordinate so as to ensure the maximum space optical coupling efficiency and the stability of optical communication.
2. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the integrated implementation method is characterized in that: the cladding of the single-mode optical fiber is 125 mu m, and the fiber core is 8.9 mu m.
3. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the specific operation of S1 is as follows:
and (3) adhering the single-mode fiber with an adaptive capillary tube marked with a mark at intervals of 90 degrees, fixing the adhered single-mode fiber on a polishing machine, polishing one side of the single-mode fiber, rotating the single-mode fiber clockwise by 90 degrees according to the mark on the capillary tube, polishing again, and rotating for one circle to obtain the rectangular single-mode fiber with the side length of 15+/-0.5 mu m.
4. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the integrated implementation method is characterized in that: the specific operation of S3 is as follows:
firstly, fixing the unground parts of four rectangular single-mode fibers together by using an adaptive customizing device;
secondly, fixing the polished part in a four-quadrant mode by utilizing a capillary tube;
thirdly, adhering the fixed four rectangular single-mode fibers;
and finally, arranging the structure after adhesion preparation on an optical fiber cutting knife, and cutting an optical fiber by using the optical fiber cutting knife, so as to obtain the integrated optical fiber type four-quadrant structure based on optical fiber coupling space two-position deflection angle measurement and communication.
5. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 4, wherein the integrated implementation method is characterized in that: the optical fiber type four-quadrant structure comprises a first rectangular single mode optical fiber, a second rectangular single mode optical fiber, a third rectangular single mode optical fiber and a fourth rectangular single mode optical fiber.
6. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the integrated implementation method is characterized in that: and the data processing center judges the position of the light spot according to the light intensity data, and when judging that the light spot is offset and initially positioned, the data processing center adjusts the coordinates of the light spot to be kept at the initial position through the quick reflection mirror.
7. The integrated implementation method for spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the integrated implementation method is characterized in that: the upper computer receives light spot position data, coupling efficiency and light intensity data received by the optical fiber type four-quadrant structure from the data processing center.
8. The integrated implementation method of spatial two-dimensional deflection angle measurement communication based on optical fiber coupling according to claim 1, wherein the calculation formula for calculating the center position of the light spot in S6 is:
wherein x and y are relative distances between the center of the light spot and the center of the optical fiber type four-quadrant structure in the horizontal and vertical directions; ei (i=1, 2,3, 4) is the received spot energy for each quadrant; ex is the bias light intensity of the four-quadrant detector in the horizontal direction; ey is the bias light intensity of the four-quadrant detector in the vertical direction.
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