Optical waveguide coupling system, method and imaging system

Abstract

The application provides an optical waveguide coupling system, method and imaging system. The optical waveguide coupling system comprises a light source module, a light beam adjusting module, a monitoring module, a coupling module, an optical waveguide and a controller. According to the monitoring result, the light beam adjusting module is controlled to adjust the light beam to a target transmission direction, so that the target transmission direction is perpendicular to the incident end surface of the optical waveguide. The monitoring module of the application monitors the transmission direction of the light beam. The coupling module adjusts the transmission direction of the light beam according to the monitored transmission direction of the light beam, so that the transmission direction of the light beam coincides with the target transmission direction, that is, the transmission direction of the light beam is perpendicular to the incident end surface of the optical waveguide, so as to improve the coupling efficiency. At the same time, the setting of the monitoring module can also improve the coupling precision. In addition, the light beam adjusting module in the application has strong regulation and control ability on the propagation direction of the light beam, which further improves the coupling precision.

Description

Technical Field

[0001] This application relates to the field of optical waveguide coupling technology, specifically to an optical waveguide coupling system, method, and imaging system. Background Technology

[0002] With the development of optical technology, efficiently coupling free-space propagating light beams into optical waveguides is a key step in many optoelectronic systems. However, related technologies have poor ability to adjust the propagation direction of the light beam and poor coupling accuracy. Summary of the Invention

[0003] To address the aforementioned issues, embodiments of this application provide an optical waveguide coupling system, method, and imaging system.

[0004] In a first aspect, embodiments of this application provide an optical waveguide coupling system, comprising: a light source module, a beam adjustment module, a monitoring module, a coupling module, an optical waveguide, and a controller; wherein the light source module, beam adjustment module, coupling module, and optical waveguide are sequentially arranged in the transmission optical path, and the monitoring module is arranged between the coupling module and the beam adjustment module; the light source module is used to emit a light beam; the beam adjustment module is used to adjust the transmission direction of the light beam; the monitoring module is used to monitor the transmission direction of the light beam and generate monitoring results; the coupling module is used to couple the light beam adjusted by the beam adjustment module to the optical waveguide; the controller is used to: control the beam adjustment module to adjust the transmission direction of the light beam to a target transmission direction according to the monitoring results, wherein the target transmission direction is perpendicular to the incident end face of the optical waveguide.

[0005] In conjunction with the first aspect, in some implementations of the first aspect, the beam adjustment module includes a first reflector and a second reflector, such that the beam is reflected sequentially on the first reflector and the second reflector; the first reflector can rotate about a first direction axis and a second direction axis respectively, and the second reflector can rotate about a third direction axis and a fourth direction axis respectively, the first direction axis and the second direction axis are perpendicular, and the third direction axis and the fourth direction axis are perpendicular.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the optical waveguide coupling system further includes a first beam splitting structure, wherein the first beam splitting structure is disposed between the beam conditioning module and the coupling module; the first beam splitting structure is used to split a portion of the beam to the monitoring module.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the optical waveguide coupling system also includes a power detection module for determining the coupling efficiency of the beam.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the power detection module includes a first power detector and a second power detector. The first power detector is located between the beam adjustment module and the coupling module and is used to determine the optical power of the beam entering the coupling module. The second power detector is located at the end of the optical waveguide and is used to determine the optical power of the beam coupled to the optical waveguide.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the optical waveguide coupling system further includes a second beam splitting structure disposed between the beam conditioning module and the coupling module; the second beam splitting structure is used to split a portion of the beam to the first power detector.

[0010] Secondly, embodiments of this application provide an optical waveguide coupling method, applied to the optical waveguide coupling system of any of the claims above. The method includes: controlling a light source module to emit a light beam; after the emitted light beam passes through a beam adjustment module, part of the light beam enters a monitoring module, and part of the light beam enters a coupling module; controlling the monitoring module to monitor the transmission direction of the light beam after adjustment by the beam adjustment module, and generating a monitoring result; and determining a beam adjustment strategy based on the monitoring result.

[0011] In conjunction with the second aspect, in some implementations of the second aspect, the beam adjustment strategy is determined based on the monitoring results, including: determining whether the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction; if the monitoring results show that the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction, then no beam adjustment is required; if the monitoring results show that the transmission direction of the beam adjusted by the beam adjustment module is inconsistent with the target transmission direction, then based on the monitoring results, the beam adjustment module is controlled to adjust the transmission direction of the beam to the target transmission direction.

[0012] In conjunction with the second aspect, in some implementations of the second aspect, the beam adjustment module includes a first reflector and a second reflector. Based on monitoring results, controlling the beam adjustment module to adjust the beam to the target transmission direction includes: controlling the beam adjustment module to perform at least one cycle until the propagation direction of the beam is adjusted to the target transmission direction, wherein each cycle includes: adjusting the reflection angle of the beam by the first reflector and the second reflector to reduce the angular deviation between the beam after passing through the coupling module and the incident end face of the optical waveguide; adjusting the reflection angle of the beam by the second reflector to reduce the distance between the point where the beam after passing through the coupling module illuminates the incident end face of the optical waveguide and the target point on the incident end face of the optical waveguide.

[0013] Thirdly, embodiments of this application provide an imaging system, including the aforementioned optical waveguide coupling system.

[0014] This application provides an optical waveguide coupling system, method, and imaging system. The optical waveguide coupling system includes a light source module, a beam adjustment module, a monitoring module, a coupling module, an optical waveguide, and a controller. Based on the monitoring results, the beam adjustment module adjusts the beam's propagation direction to the target propagation direction, making the target propagation direction perpendicular to the incident end face of the optical waveguide. The monitoring module monitors the beam's propagation direction, and the coupling module adjusts the beam's propagation direction based on this monitoring to ensure it coincides with the target propagation direction, i.e., the beam's propagation direction is perpendicular to the incident end face of the optical waveguide, thereby improving coupling efficiency. The monitoring module also enhances coupling accuracy. Furthermore, the beam adjustment module in this application has a strong ability to control the beam propagation direction, further improving coupling accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an optical waveguide coupling system provided in an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the structure of an optical waveguide coupling system provided in another embodiment of this application.

[0017] Figure 3a This is a schematic flowchart of an embodiment of the optical waveguide coupling method provided in this application.

[0018] Figure 3b This is a flowchart illustrating the adjustment strategy for determining the beam provided in one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0021] Figure 6 A schematic diagram illustrating the principle of angle deviation optimization provided in one embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0024] Figure 9 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0025] Figure 10This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0026] Figure 11 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0027] Figure 12 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0028] Figure 13 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0029] Figure 14 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0030] Figure 15 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0031] Figure 16 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0032] Figure 17 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0033] Figure 18 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0034] Figure 19 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application.

[0035] Figure 20 This is a schematic diagram of the structure of the optical waveguide input end face during the optical waveguide coupling process provided in an embodiment of this application.

[0036] Figure 21 This is a schematic diagram of the structure of an imaging system provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures 100 Optical waveguide coupling system; 110 Light source module; 120 Beam adjustment module; 121 First reflector; 122 Second reflector; 130 Monitoring module; 131 First position detector; 132 Second position detector; 133 Third beam splitter structure; 134 Third reflector; 140 Coupling module; 141 Lens; 150 Optical waveguide; 160 Controller; 170 Power detection module; 171 First power detector; 172 Second power detector; 181 First beam splitter structure; 182 Second beam splitter structure; 200 Imaging system; X1 First direction axis; Y1 Second direction axis; X2 Third direction axis; Y2 Fourth direction axis; X3 Fifth direction axis; Y3 Sixth direction axis. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Figure 1 This is a schematic diagram of the structure of an optical waveguide coupling system provided in one embodiment of this application. Figure 1 As shown, one embodiment of this application provides an optical waveguide coupling system 100, including: a light source module 110, a beam adjustment module 120, a monitoring module 130, a coupling module 140, an optical waveguide 150, and a controller 160; wherein, the light source module 110, the beam adjustment module 120, the coupling module 140, and the optical waveguide 150 are sequentially arranged on the transmission optical path, and the monitoring module 130 is arranged between the coupling module 140 and the beam adjustment module 120; the light source module 110 is used to emit a light beam; the beam adjustment module 120 is used to adjust the transmission direction of the light beam; the monitoring module 130 is used to monitor the transmission direction of the light beam and generate monitoring results; the coupling module 140 is used to couple the light beam adjusted by the beam adjustment module 120 to the optical waveguide 150; the controller 160 is used to: control the beam adjustment module 120 to adjust the transmission direction of the light beam to a target transmission direction according to the monitoring results, wherein the target transmission direction is perpendicular to the incident end face of the optical waveguide 150.

[0040] In some embodiments, the light source module 110 may be a device such as a laser or a light-emitting diode that can stably emit a light beam, the emitted light beam serving as the coupled original optical signal. The beam adjustment module 120 is disposed after the light source module 110 and is used to receive the light beam emitted by the light source module 110 and adjust its transmission direction.

[0041] In some embodiments, the monitoring module 130 includes a position detector, such as any one of a four-quadrant detector, a position-sensitive detector (PSD), or a camera. When a light beam shines on the position detector, the detector can generate a corresponding electrical signal, i.e., a monitoring result, based on the position information of the light spot. This monitoring result can accurately reflect the current transmission direction of the light beam.

[0042] In some embodiments, the coupling module 140 includes a lens for focusing the light beam to its focal plane, and the incident end face of the optical waveguide 150 coincides with this focal plane. Furthermore, the center point of the incident end face coincides with the focal point of the lens to improve the efficiency of beam coupling. It is understood that the optical waveguide 150, as a carrier for beam transmission, receives the light beam coupled in via the coupling module 140 at its incident end face.

[0043] In some embodiments, the controller 160 is electrically connected to the monitoring module 130 and the beam adjustment module 120, respectively. The controller 160 receives the monitoring results sent by the monitoring module 130 and analyzes and processes the results to determine whether the current beam transmission direction is consistent with the preset target transmission direction. The beam transmission direction refers to the transmission direction of the beam before it reaches the coupling module 140. The monitoring module 130 continuously samples at high speed to monitor the current beam transmission direction in real time. If the monitoring results indicate that the beam transmission direction deviates from the target transmission direction, the controller 160 will send control commands to the beam adjustment module 120 in real time to adjust the beam transmission direction according to the degree and direction of the deviation, thereby adjusting the beam transmission direction to the target transmission direction to improve coupling accuracy. For example, the controller 160 can be any embedded platform such as an Advanced RISC Machine (ARM), a Microcontroller Unit (MCU), a Field-Programmable Gate Array (FPGA), or a computer.

[0044] In this embodiment, based on the monitoring results, the beam adjustment module 120 adjusts the beam's transmission direction to the target transmission direction, so that the beam's transmission direction is perpendicular to the incident end face of the optical waveguide 150. The monitoring module monitors the beam's transmission direction, and the coupling module adjusts the beam's transmission direction according to the monitored direction to make it coincide with the target transmission direction, i.e., the beam's transmission direction is perpendicular to the incident end face of the optical waveguide, thereby improving coupling efficiency. The monitoring module also improves coupling accuracy. Furthermore, the beam adjustment module in this application has a strong ability to control the beam propagation direction, further improving coupling accuracy.

[0045] Figure 2 This is a schematic diagram of the structure of an optical waveguide coupling system provided in another embodiment of this application. For example... Figure 2 As shown, in some embodiments, the beam adjustment module 120 includes a first reflector 121 and a second reflector 122, such that the beam is reflected sequentially on the first reflector 121 and the second reflector 122; the first reflector 121 can rotate about a first direction axis X1 and a second direction axis Y1 respectively, and the second reflector 122 can rotate about a third direction axis X2 and a fourth direction axis Y2 respectively, the first direction axis X1 and the second direction axis Y1 are perpendicular, and the third direction axis X2 and the fourth direction axis Y2 are perpendicular.

[0046] Specifically, the rotation of the first reflector 121 about the first direction axis X1 includes clockwise or counterclockwise rotation of the first reflector 121 about the first direction axis X1; the rotation of the first reflector 121 about the second direction axis Y1 includes clockwise or counterclockwise rotation of the first reflector 121 about the second direction axis Y1; the rotation of the second reflector 122 about the third direction axis X2 includes clockwise or counterclockwise rotation of the second reflector 122 about the third direction axis X2; the rotation of the second reflector 122 about the fourth direction axis Y2 includes clockwise or counterclockwise rotation of the second reflector 122 about the fourth direction axis Y2. It can be understood that both the first reflector 121 and the second reflector 122 can rotate at any angle in space. In different states, the first reflector 121 may be parallel to the second reflector 122, or the first reflector 121 may not be parallel to the second reflector 122.

[0047] In some embodiments, the second directional axis Y1 coincides with the normal of the first reflector 121, and the fourth directional axis Y2 coincides with the normal of the second reflector 122.

[0048] In this embodiment, the light beam can be reflected sequentially on the surfaces of the first reflector 121 and the second reflector 122. Specifically, the first reflector 121 has degrees of freedom to rotate about a first direction axis X1 and a second direction axis Y1 that are perpendicular to each other, and the second reflector 122 has degrees of freedom to rotate about a third direction axis X2 and a fourth direction axis Y2. By controlling the rotation angles of the first reflector 121 and the second reflector 122, the reflection direction of the light beam in the corresponding plane can be changed, thereby increasing the range of adjustment of the light transmission direction, improving control accuracy, and thus improving the coupling efficiency of the optical waveguide 150. Moreover, in this embodiment, the first reflector 121 and the second reflector 122 can rotate at a relatively large angle in any direction, so the optical waveguide coupling system 100 of this embodiment can improve the long-distance spatial optical coupling efficiency.

[0049] In some embodiments, the beam adjustment module 120 further includes a stepper motor or a piezoelectric drive motor to drive the first reflector 121 and / or the second reflector 122 to rotate.

[0050] In some embodiments, the optical waveguide coupling system 100 further includes a power detection module 170 for determining the coupling efficiency of the light beam. Specifically, the power detection module 170 includes a first power detector 171 and a second power detector 172. The first power detector 171 is located between the beam adjustment module 120 and the coupling module 140 and is used to determine the optical power of the light beam entering the coupling module 140. The second power detector 172 is located at the end of the optical waveguide 150 and is used to determine the optical power of the light beam coupled to the optical waveguide 150.

[0051] Specifically, the first power detector 171 monitors the optical power of the beam before it enters the coupling module 140 in real time, and records it as the input optical power P1; the second power detector 172 monitors the output optical power P2 at the end of the optical waveguide 150, i.e., the output end of the beam after coupling transmission. The coupling efficiency can be obtained from the ratio of the input optical power P1 to the output optical power P2.

[0052] In some embodiments, the first power detector 171 and / or the second power detector 172 may be a power meter or a photodiode (PD).

[0053] In some embodiments, the coupling module 140 includes a lens 141 for focusing the light beam to its focal plane, and the incident end face of the optical waveguide 150 coincides with this focal plane. Furthermore, the center point of the incident end face coincides with the focal point of the lens to improve the efficiency of beam coupling. It is understood that the optical waveguide 150, as a carrier for beam transmission, receives the light beam coupled through the coupling module 140 at its incident end face.

[0054] In this embodiment, the controller 160 adjusts the rotation direction and angle of the first reflector 121 and / or the second reflector 122 according to the coupling efficiency of the beam, so that the coupling efficiency of the beam after the transmission direction adjustment is greater than the coupling efficiency of the beam before the transmission direction adjustment. For example, the power detection module 170 calculates a coupling efficiency of 70%, and the controller 160 controls the second reflector 122 to rotate clockwise on the fourth direction axis Y2. However, if the coupling efficiency calculated by the power detection module 170 is less than 70%, it means that rotating the second reflector 122 clockwise on the fourth direction axis Y2 will reduce the beam coupling efficiency, that is, the rotation direction is incorrect. The controller immediately adjusts the second reflector 122 to rotate counterclockwise on the fourth direction axis Y2.

[0055] It is worth noting that the optical waveguide coupling system 100 in this embodiment can use the monitoring module 130 alone, the power detection module 170 alone, or both the monitoring module 130 and the power detection module 170 simultaneously.

[0056] Using only the monitoring module 130, the optical waveguide coupling system 100 can stabilize the point on the incident end face of the light beam at the target point in real time. Specifically, when the point on the incident end face of the light beam deviates from the target point, the optical waveguide coupling system 100 can adjust the transmission direction of the light beam to make the point on the incident end face coincide with the target point.

[0057] Using only the power detection module 170, the optical waveguide coupling system 100 can automatically identify whether the target point on the incident end face of the beam has moved and determine the position of the new target point. Specifically, when the beam emitted by the light source module 110 fluctuates, the position of the target point on the incident end face moves, forming a new target point. The optical waveguide coupling system 100 can immediately determine the new target point and the coupling efficiency.

[0058] When the monitoring module 130 and the power detection module 170 are used simultaneously, the optical waveguide coupling system 100 can not only automatically determine the new target point, but also stabilize the point on the incident end face of the beam at the target point in real time.

[0059] In some embodiments, the optical waveguide coupling system 100 further includes a first beam splitting structure 181, wherein the first beam splitting structure 181 is disposed between the beam adjustment module 120 and the coupling module 140; the first beam splitting structure 181 is used to split a portion of the beam to the monitoring module 130 to determine the propagation direction of the beam.

[0060] In some embodiments, the optical waveguide coupling system 100 further includes a second beam splitting structure 182, which is disposed between the beam adjustment module 120 and the coupling module 140. Specifically, the second beam splitting structure 182 is disposed between the first beam splitting structure 181 and the coupling module 140. The second beam splitting structure 182 is used to split a portion of the beam to the first power detector 171.

[0061] Understandably, the first beam splitter 181 splits the beam reflected by the second reflector 122 to obtain a first split beam, which enters the monitoring module 130. The second beam splitter 182 splits the beam that passes through the first beam splitter 181 to obtain a second split beam, which enters the first power detector 171 to determine the optical power of the beam entering the coupling module 140.

[0062] In some embodiments, the monitoring module 130 includes a first position detector 131 and a second position detector 132. The first position detector 131 is used to determine the coordinates of the light beam passing through the second reflector 122 at a first position, and the second position detector 132 is used to determine the coordinates of the light beam passing through the second reflector 122 at a second position. It can be understood that based on the coordinates of the first and second positions, the transmission direction of the light beam can be determined, thereby determining the illumination position of the light beam coupled by the coupling module 140 on the incident end face of the optical waveguide 150, and the coupling angle between the light beam coupled by the coupling module 140 and the incident end face.

[0063] In some embodiments, the monitoring module 130 further includes a third beam splitter 133 and a third reflector 134. Along the transmission direction of the first beam splitter, the third beam splitter 133 is located between the first beam splitter 131 and the first position detector 131, splitting the first beam splitter to obtain sub-beams, which are then transmitted to the first position detector 131. The third reflector 134 is located between the third beam splitter 133 and the second position detector 132, reflecting the light reflected by the third beam splitter 133 to the second position detector 132.

[0064] Understandably, the controller 160 is also electrically connected to the power sensing module 170 to obtain coupling efficiency. It is worth noting that... Figure 2 Controller 160 is not shown.

[0065] In this embodiment, by setting the first reflector 121 and the second reflector 122, the transmission direction of the light beam in different planes can be independently and precisely adjusted, thereby achieving precise control of the overall transmission direction of the light beam. The first position detector 131 and the second position detector 132 are set to determine the transmission direction of the light beam, thereby determining the illumination position of the light beam coupled by the coupling module 140 on the incident end face of the optical waveguide 150, and the coupling angle between the light beam coupled by the coupling module 140 and the incident end face. Based on the illumination position on the incident end face of the optical waveguide 150 and the coupling angle between the light beam and the incident end face, the rotation direction and angle of the first reflector 121 and / or the second reflector 122 are controlled, thereby improving the coupling efficiency. In addition, this application provides a first power detector 171 and a second power detector 172 so that the controller 160 can acquire the power data of the light beam before and after coupling in real time, obtain the current coupling efficiency, and adjust the rotation direction and angle of the first reflector 121 and / or the second reflector 122 according to the current coupling efficiency, shortening the coupling time.

[0066] Figure 3aFigure 3 is a flowchart illustrating an embodiment of an optical waveguide coupling method provided in this application. As shown in Figure 3, an embodiment of this application provides an optical waveguide coupling method applied to any of the aforementioned optical waveguide coupling systems 100. The method includes: Step S101: Control the light source module to emit a light beam.

[0067] After the emitted beam passes through the beam adjustment module 120, part of the beam enters the monitoring module 130 and part of the beam enters the coupling module 140.

[0068] Step S102: The control monitoring module monitors the transmission direction of the beam after it has been adjusted by the beam adjustment module and generates monitoring results.

[0069] Step S103: Determine the beam adjustment strategy based on the monitoring results.

[0070] In this embodiment, a beam adjustment strategy is determined based on the monitoring results to improve coupling accuracy. Specifically, the monitoring module monitors the beam's propagation direction, and the coupling module adjusts the beam's propagation direction according to the monitored direction to ensure it coincides with the target propagation direction, i.e., the beam's propagation direction is perpendicular to the incident end face of the optical waveguide, thereby improving coupling efficiency. The monitoring module also enhances coupling accuracy. Furthermore, the beam adjustment module in this application possesses strong control over the beam propagation direction, further improving coupling accuracy.

[0071] Figure 3b This is a flowchart illustrating a strategy for determining the beam adjustment according to an embodiment of this application. Figure 3b As shown, based on the monitoring results, the beam adjustment strategy is determined, including: Step S201: Determine whether the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction, based on the monitoring results. If the monitoring results show that the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction, proceed to step S202; if the monitoring results show that the transmission direction of the beam adjusted by the beam adjustment module is inconsistent with the target transmission direction, proceed to step S203.

[0072] Step S202: No beam adjustment is required.

[0073] Step S203: Based on the monitoring results, control the beam adjustment module to adjust the beam transmission direction to the target transmission direction.

[0074] In some embodiments, the beam adjustment module 120 includes a first reflector 121 and a second reflector 122. Based on monitoring results, controlling the beam adjustment module 120 to adjust the beam to the target transmission direction includes: controlling the beam adjustment module 120 to perform at least one cycle until the propagation direction of the beam is adjusted to the target transmission direction. Each cycle includes: adjusting the reflection angle of the beam by the first reflector 121 and the second reflector 122 to reduce the angular deviation between the beam after passing through the coupling module 140 and the incident end face of the optical waveguide 150; adjusting the reflection angle of the beam by the second reflector 122 to reduce the distance between the point where the beam after passing through the coupling module 140 illuminates the incident end face of the optical waveguide 150 and the target point on the incident end face of the optical waveguide 150.

[0075] The angle deviation between the beam after coupling module 140 and the incident end face of optical waveguide 150 is called angular deviation; the distance between the point where the beam after coupling module 140 illuminates the incident end face of optical waveguide 150 and the target point on the incident end face of optical waveguide 150 is called radial deviation; the reflection angle of the beam by the first reflector 121 is the angle between the reflected ray of the first reflector 121 and the normal of the first reflector 121 in the current state; the reflection angle of the beam by the second reflector 122 is the angle between the reflected ray of the second reflector 122 and the normal of the second reflector 122 in the current state.

[0076] It is worth noting that the angular deviation includes the angular deviation of the fifth direction X3 and the angular deviation of the sixth direction Y3, and the radial deviation includes the radial deviation of the fifth direction X3 and the radial deviation of the sixth direction Y3, wherein the fifth direction X3 is perpendicular to the sixth direction Y3.

[0077] Specifically, Figure 4 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. For example... Figure 4As shown, in the initial state, the light beam is irradiated at point P1 on the incident end face of the optical waveguide 150 after passing through lens 141. At this time, the angle between the coupled light beam and the center line of the incident end face of the optical waveguide 150 along the fifth direction X3 is α1, that is, the angular deviation along the fifth direction X3 is α1. The coupling efficiency in the initial state is determined to be b1 based on the first power detector 171 and the second power detector 172. At this time, it is necessary to reduce the angular deviation of the light beam after passing through the coupling module 140 along the fifth direction X3 on the incident end face of the optical waveguide 150. That is, the controller 160 controls the first reflector 121 to rotate clockwise along the first direction axis X1 and controls the second reflector 122 to rotate clockwise along the third direction axis X2. The clockwise rotation angle of the first reflector 121 along the first direction axis X1 is the same as the clockwise rotation angle of the second reflector 122 along the third direction axis X2. The coupling efficiency b2 at this time is determined based on the first power detector 171 and the second power detector 172. Determine if b2 is greater than b1. If b2 is less than b1, it indicates that rotating the first reflector 121 clockwise along the first direction axis X1 and the second reflector 122 clockwise along the third direction axis X2 reduces beam coupling efficiency. Control the first reflector 121 to rotate counterclockwise along the first direction axis X1 and the second reflector 122 to rotate counterclockwise along the third direction axis X2, with the rotation angle of the first reflector 121 along the first direction axis X1 being the same as the rotation angle of the second reflector 122 along the third direction axis X2. If b2 is greater than b1, it indicates that rotating the first reflector 121 clockwise along the first direction axis X1 and the second reflector 122 clockwise along the third direction axis X2 improves beam coupling efficiency. Continue controlling the first reflector 121 to rotate clockwise along the first direction axis X1 and the second reflector 122 clockwise along the third direction axis X2, and monitor the peak value of the coupling efficiency. When the coupling efficiency reaches its peak, the first reflecting mirror 121 and the second reflecting mirror 122 stop rotating. At this time, the angle between the coupled light beam and the center line of the incident surface of the optical waveguide 150 along the fifth direction X3 is a2, that is, the angular deviation along the fifth direction X3 is a2, and the coupling efficiency is b2'. Specifically, the positional relationship between the light beam and the incident surface of the optical waveguide 150 at this time is as follows: Figure 5 As shown, Figure 5 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. The light beam still illuminates point P1 on the incident end face of the optical waveguide 150 after passing through lens 141. It can be understood that a2 < a1 at this time, that is, the angular deviation optimization in the fifth direction X3 is completed.

[0078] It is worth noting that when searching for the minimum angular deviation, the radial deviation should be kept constant, the light beam incident on the incident end face of the optical waveguide 150 should pass through the same point on the focal plane of the lens 141, and the incident light in front of the lens 141 should be parallel light.

[0079] Figure 6This is a schematic diagram illustrating the principle of angle deviation optimization according to an embodiment of this application. Figure 6 As shown, when the first reflector 121 rotates clockwise along the first direction axis X1 and the second reflector 122 rotates clockwise along the third direction axis X2, and the rotation angles of the first reflector 121 and the second reflector 122 are both Δθ, then the light beams emitted from the second reflector 122 before and after rotation are parallel to each other. Similarly, when the first reflector 121 rotates counterclockwise along the first direction axis X1 and the second reflector 122 rotates counterclockwise along the third direction axis X2, and the rotation angles of the first reflector 121 and the second reflector 122 are both Δθ, then the light beams emitted from the second reflector 122 before and after rotation are parallel to each other. It can be understood that Δθ is the difference in the reflection angle of the light beam by the first reflector 121 or the second reflector 122 before and after adjustment.

[0080] Understandably, when the first reflector 121 rotates clockwise along the second axis Y1 and the second reflector 122 rotates counterclockwise along the fourth axis Y2, and the clockwise rotation angle of the first reflector 121 along the second axis Y1 and the counterclockwise rotation angle of the second reflector 122 along the fourth axis Y2 are both Δθ, then the light beams emitted from the second reflector 122 before and after rotation are parallel to each other. Similarly, when the first reflector 121 rotates counterclockwise along the second axis Y1 and the second reflector 122 rotates clockwise along the fourth axis Y2, and the counterclockwise rotation angle of the first reflector 121 along the second axis Y1 and the clockwise rotation angle of the second reflector 122 along the fourth axis Y2 are both Δθ, then the light beams emitted from the second reflector 122 before and after rotation are parallel to each other. (Not illustrated here).

[0081] It is worth noting that, Figure 6 In this context, θ1 is the angle between the incident beam before the first reflector 121 rotates and the normal of the first reflector 121; θ2 is the angle between the incident beam before the second reflector 122 rotates and the normal of the second reflector 122.

[0082] At this point, it is necessary to reduce the angular deviation of the beam after passing through the coupling module 140 along the sixth direction Y3 on the fiber end face. That is, the controller 160 controls the first reflector 121 to rotate clockwise along the second direction axis Y1 and controls the second reflector 122 to rotate counterclockwise along the fourth direction axis Y2. The clockwise rotation angle of the first reflector 121 along the second direction axis Y1 is the same as the counterclockwise rotation angle of the second reflector 122 along the fourth direction axis Y2. The coupling efficiency b3 is determined at this time based on the first power detector 171 and the second power detector 172. Determine if b3 is greater than b2'. If b3 is less than b2, it indicates that rotating the first reflector 121 clockwise along the second direction axis Y1 and the second reflector 122 counterclockwise along the fourth direction axis Y2 reduces beam coupling efficiency. Control the first reflector 121 to rotate counterclockwise along the second direction axis Y1 and the second reflector 122 to rotate clockwise along the fourth direction axis Y2, with the counterclockwise rotation angle of the first reflector 121 along the second direction axis Y1 being the same as the clockwise rotation angle of the second reflector 122 along the fourth direction axis Y2. If b3 is greater than b2, it indicates that rotating the first reflector 121 clockwise along the second direction axis Y1 and the second reflector 122 counterclockwise along the fourth direction axis Y2 improves beam coupling efficiency. Continue controlling the first reflector 121 to rotate clockwise along the second direction axis Y1 and the second reflector 122 counterclockwise along the fourth direction axis Y2, and monitor the peak value of the coupling efficiency. When the coupling efficiency reaches its peak, the first reflecting mirror 121 and the second reflecting mirror 122 stop rotating. At this time, the angle between the coupled light beam and the center line of the incident surface of the optical waveguide 150 along the sixth direction Y3 is a3, that is, the angular deviation along the sixth direction Y3 is a3, and the coupling efficiency is b3'. Specifically, the positional relationship between the light beam and the incident surface of the optical waveguide 150 at this time is as follows: Figure 7 and Figure 8 As shown, Figure 7 This is a schematic diagram of the coupling process of the optical waveguide 150 provided in an embodiment of this application. Figure 8 This is a schematic diagram of the optical waveguide 150's incident end face during the coupling process according to an embodiment of this application. The light beam, after passing through lens 141, still illuminates point P2 on the incident end face of the optical waveguide 150. Here, XOP2 is the distance from P2 to the center point of the incident end face of the optical waveguide 150 along the fifth direction X3, i.e., the radial deviation along the fifth direction X3 at this time; YOP2 is the distance from P2 to the center point of the incident end face of the optical waveguide 150 along the sixth direction Y3, i.e., the radial deviation along the sixth direction Y3 at this time. It can be understood that the angular deviation optimization in the sixth direction Y3 is completed at this time.

[0083] At this point, it is necessary to reduce the radial deviation of the beam after passing through the coupling module 140 along the fifth direction X3 on the fiber end face. Specifically, the controller 160 controls the second reflector 122 to rotate clockwise along the third direction axis X2, and determines the coupling efficiency b4 based on the first power detector 171 and the second power detector 172. It is then determined whether b4 is greater than b3'. If b4 is less than b3', it indicates that rotating the second reflector 122 clockwise along the third direction axis X2 reduces the beam coupling efficiency, and the controller controls the second reflector 122 to rotate counterclockwise along the third direction axis X2. If b4 is greater than b3', it indicates that rotating the second reflector 122 clockwise along the third direction axis X2 can improve the beam coupling efficiency, and the controller continues to control the second reflector 122 to rotate clockwise along the third direction axis X2, monitoring the peak value of the coupling efficiency. When the coupling efficiency reaches its peak, the second reflector 122 stops rotating. At this point, the angle between the coupled light beam and the center line of the incident surface of the optical waveguide 150 along the fifth direction X3 is a4, that is, the angular deviation along the fifth direction X3 is a4, and the coupling efficiency is b4'. Specifically, the positional relationship between the light beam and the incident surface of the optical waveguide 150 at this time is as follows: Figure 9 and Figure 10 As shown, Figure 9 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 10 This is a schematic diagram of the optical waveguide coupling process and the optical waveguide incident end face according to an embodiment of this application. At this time, the light beam illuminating the lens 141 is not parallel; the light spot illuminating the optical fiber end face is a circle with radius l1, and the center point of the circle is P3. The distance XOP3 from P3 to the center point of the incident end face of the optical waveguide 150 along the fifth direction X3 is less than the distance XOP2 from P2 to the center point of the incident end face of the optical waveguide 150 along the fifth direction X3, i.e., XOP3 < XOP2. The radial deviation along the fifth direction X3 decreases, which can be understood as completing the radial deviation optimization in the fifth direction X3. However, the angular deviation increases at this time, a4 > a3. It is worth noting that the radial deviation along the sixth direction Y3 remains unchanged at this time, still being YOP2.

[0084] It is worth noting that when the second reflector 122 is rotated, the angular deviation and radial deviation of the beam incident on the incident end face of the optical waveguide 150 change simultaneously. When the first reflector 121 is rotated along the first direction axis X1 and the second reflector 122 is rotated along the third direction axis X2, and the rotation angle of the first reflector 121 along the first direction axis X1 is the same as the rotation angle of the second reflector 122 along the third direction axis X2, or when the first reflector 121 is rotated along the second direction axis Y1 and the second reflector 122 is rotated along the fourth direction axis Y2, and the rotation angle of the first reflector 121 along the second direction axis Y1 is the same as the rotation angle of the second reflector 122 along the fourth direction axis Y2, the angular deviation can be significantly reduced, while the increase in radial deviation is relatively small. Therefore, after rotating only the second reflector 122, controlling the first reflector 121 to rotate along the first direction axis X1 and the second reflector 122 to rotate along the third direction axis X2, with the rotation angle of the first reflector 121 along the first direction axis X1 being the same as the rotation angle of the second reflector 122 along the third direction axis X2, or controlling the first reflector 121 to rotate along the second direction axis Y1 and the second reflector 122 to rotate along the fourth direction axis Y2, with the rotation angle of the first reflector 121 along the second direction axis Y1 being the same as the rotation angle of the second reflector 122 along the fourth direction axis Y2, can significantly reduce the angular deviation that increases when only rotating the second reflector 122. Similarly, by rotating the first reflector 121 along the first direction axis X1 and the second reflector 122 along the third direction axis X2, with the rotation angle of the first reflector 121 along the first direction axis X1 being the same as the rotation angle of the second reflector 122 along the third direction axis X2, or by controlling the first reflector 121 to rotate along the second direction axis Y1 and the second reflector 122 to rotate along the fourth direction axis Y2, with the rotation angle of the first reflector 121 along the second direction axis Y1 being the same as the rotation angle of the second reflector 122 along the fourth direction axis Y2, rotating only the second reflector 122 along either the third direction axis X2 or the fourth direction axis Y2 can significantly reduce the radial deviation increased when rotating the first reflector 121 and the second reflector 122. Therefore, repeatedly rotating the first reflector 121 and the second reflector 122, and then rotating the second reflector 122 again, can decouple the optimization of angular deviation and the optimization of radial deviation. It is worth noting that, since the distance between the second reflector 122 and the lens 141 is smaller than the distance between the first reflector 121 and the lens 141, adjusting the rotation angle of the second reflector 122 can maximize the reduction of radial deviation and minimize the increase of angular deviation, thereby further decoupling the optimization of angular deviation and the optimization of radial deviation.

[0085] Therefore, it is necessary to reduce the angular deviation of the beam after coupling module 140 along the fifth direction X3 on the fiber end face. Specifically, controller 160 controls the first reflector 121 to rotate clockwise along the first direction axis X1, and controls the second reflector 122 to rotate clockwise along the third direction axis X2. The clockwise rotation angle of the first reflector 121 along the first direction axis X1 is the same as the clockwise rotation angle of the second reflector 122 along the third direction axis X2. The coupling efficiency b5 is determined based on the first power detector 171 and the second power detector 172. It is then determined whether b5 is greater than b4'. The specific determination result and rotation method are similar to those described above and will not be repeated here. The peak value of the coupling efficiency is monitored. When the coupling efficiency reaches its peak value, the first reflector 121 and the second reflector 122 stop rotating. At this time, the angle between the coupled beam and the center line of the incident end face of the optical waveguide 150 along the fifth direction X3 is a5, and the coupling efficiency is b5'. Specifically, the positional relationship between the beam and the incident end face of the optical waveguide 150 at this time is as follows: Figure 11 and Figure 12 As shown, Figure 11 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 12 This is a schematic diagram of the optical waveguide coupling process and the optical waveguide incident end face provided in an embodiment of this application. At this time, the light illuminating the lens 141 is parallel light, and the light rays are focused by the lens 141 onto point P4 of the incident end face of the optical waveguide 150. Since a5 < a4, the angular deviation along the fifth direction X3 is reduced, thus completing the optimization of the angular deviation in the fifth direction X3. However, the distance XOP4 from P4 to the center point O of the incident end face of the optical waveguide 150 along the fifth direction X3 is greater than the horizontal distance XOP3 from P3 to the center point of the incident end face of the optical waveguide 150, and less than the horizontal distance XOP2 from P2 to the center point of the incident end face of the optical waveguide 150 (XOP3 < XOP4 < XOP2), resulting in an increase in the radial deviation along the horizontal direction. Therefore, it is necessary to control the second reflector 122 to rotate again along the third third-direction axis X2 to reduce the radial deviation in the fifth direction X3, thereby achieving optimization of the radial deviation in the fifth direction X3. Then, continue rotating the first reflecting mirror 121 and the second reflecting mirror 122, i.e., perform multiple cycles, until the positional relationship between the beam and the incident end face of the optical waveguide 150 is as follows. Figure 13 and Figure 14 As shown, Figure 13 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 14This is a schematic diagram of the optical waveguide incident end face during the optical waveguide coupling process according to an embodiment of this application. At this time, the light beam illuminating the lens 141 is parallel light. The light beam is focused by the lens 141 onto Px on the incident end face of the optical waveguide 150. At this time, the angle between the coupled light beam and the center line of the incident end face of the optical waveguide 150 along the fifth direction X3 is 0, and the radial deviation along the fifth direction X3 is 0. The angle between the coupled light beam and the center line of the incident end face of the optical waveguide 150 along the sixth direction Y3 is ax, and the coupling efficiency is bx.

[0086] At this point, it is necessary to reduce the radial deviation of the beam after passing through the coupling module 140 along the sixth direction Y3 on the fiber end face. Specifically, the controller 160 controls the second reflector 122 to rotate clockwise along the fourth direction axis Y2, and determines the coupling efficiency bx+1 based on the first power detector 171 and the second power detector 172. The determination of whether bx+1 is greater than bx is similar to the aforementioned method and will not be repeated here. The peak value of the coupling efficiency is monitored. When the coupling efficiency reaches its peak, the second reflector 122 stops rotating. At this point, the angle between the coupled beam and the center line of the incident end face of the optical waveguide 150 along the sixth direction Y3 is ax+1, meaning the angular deviation along the sixth direction Y3 is ax+1, and the coupling efficiency is bx+1'. Specifically, the positional relationship between the beam and the incident end face of the optical waveguide 150 at this point is as follows: Figure 15 and Figure 16 As shown, Figure 15 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 16 This is a schematic diagram of the optical waveguide coupling process and the optical waveguide incident end face provided in an embodiment of this application. At this time, the light beam illuminating the lens 141 is not parallel light, and the light spot illuminating the incident end face of the optical waveguide 150 is a circle with a diameter of lx, and the center point of the circle is Px+1. At this time, the distance YOPx+1 from Px+1 to the center point of the incident end face of the optical waveguide 150 along the sixth direction Y3 is less than the distance YOPx from Px to the center point of the optical fiber end face along the sixth direction Y3, that is, YOPx+1 < YOPx, realizing the optimization of the radial deviation in the sixth direction Y3. However, at this time, ax+1 > ax, and the angular deviation along the sixth direction Y3 increases.

[0087] Continue to control the rotation of the first reflector 121 along the second direction axis Y1 and the second reflector 122 along the fourth direction axis Y2 to reduce the angular deviation of the beam after passing through the coupling module 140 along the sixth direction Y3 on the fiber end face. Monitor the peak value of the coupling efficiency. When the coupling efficiency reaches its peak value, the first reflector 121 and the second reflector 122 stop rotating. At this time, the angle between the coupled beam and the center line of the incident end face of the optical waveguide 150 along the sixth direction Y3 is ax+2, that is, the angular deviation along the sixth direction Y3 is ax+2, and the coupling efficiency is bx+2'. Specifically, the positional relationship between the beam and the incident end face of the optical waveguide 150 at this time is as follows: Figure 17 and Figure 18 As shown, Figure 17 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 18 This is a schematic diagram of the optical waveguide coupling process and the optical waveguide input end face provided in an embodiment of this application. At this time, the light illuminating the lens 141 is parallel light. The light is focused by the lens 141 onto Px+2 on the optical fiber end face. At this time, ax+2 < ax+1, and the angular deviation along the sixth direction Y3 is reduced. However, the distance YOP+2 from Px+2 to the center point O of the input end face of the optical waveguide 150 along the sixth direction Y3 is greater than the distance YOPx+1 from Px+1 to the center point O of the input end face of the optical waveguide 150 along the sixth direction Y3, and less than the distance YOPx from Px to the center point O of the input end face of the optical waveguide 150 along the sixth direction Y3. That is, YOPx+1 < YOPx+2 < YOPx, and the radial deviation along the sixth direction Y3 is increased.

[0088] Continue rotating the second reflecting mirror 122 along the fourth direction axis Y2, i.e., perform multiple cycles, until the positional relationship between the beam and the incident end face of the optical waveguide 150 is as follows. Figure 19 and Figure 20 As shown, Figure 19 This is a schematic diagram of the optical waveguide coupling process provided in an embodiment of this application. Figure 20 This is a schematic diagram of the optical waveguide incident end face during the optical waveguide coupling process according to an embodiment of this application. At this time, the light beam illuminating the lens 141 is parallel light. The beam is focused by the lens 141 onto point O on the incident end face of the optical waveguide 150. At this point, the angle between the coupled beam and the centerline of the incident end face of the optical waveguide 150 along the fifth direction X3 is 0, and the radial deviation along the fifth direction X3 is 0. The angle between the coupled beam and the centerline of the incident end face of the optical waveguide 150 along the sixth direction Y3 is 0, and the radial deviation along the sixth direction Y3 is 0, resulting in maximum coupling efficiency and completion of the coupling process.

[0089] In this embodiment, by rotating the first reflector 121 and the second reflector 122, the optimization of angular deviation and radial deviation are decoupled. The current coupling efficiency is determined by the first power detector 171 and the second power detector 172. Using the coupling efficiency as a feedback signal, the rotation direction and angle of the reflectors are dynamically adjusted to shorten the coupling time.

[0090] Figure 21 This is a schematic diagram of the structure of an imaging system provided in one embodiment of this application. Figure 21 As shown, one embodiment of this application provides an imaging system 200, including any of the optical waveguide coupling systems 100 mentioned above.

[0091] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0092] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0093] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0094] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0095] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0096] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An optical waveguide coupling system, characterized in that, include: The system comprises a light source module, a beam adjustment module, a monitoring module, a coupling module, an optical waveguide, and a controller; wherein the light source module, the beam adjustment module, the coupling module, and the optical waveguide are sequentially arranged in the transmission optical path, and the monitoring module is disposed between the coupling module and the beam adjustment module; The light source module is used to emit a light beam; The beam adjustment module is used to adjust the transmission direction of the beam; The monitoring module is used to monitor the transmission direction of the light beam and generate monitoring results; The coupling module is used to couple the beam adjusted by the beam adjustment module to the optical waveguide; The controller is used to: control the beam adjustment module to adjust the transmission direction of the beam to the target transmission direction according to the monitoring results, wherein the target transmission direction is perpendicular to the incident end face of the optical waveguide.

2. The optical waveguide coupling system according to claim 1, characterized in that, The beam adjustment module includes a first reflector and a second reflector, such that the beam is reflected sequentially on the first reflector and the second reflector; The first reflector can rotate about a first directional axis and a second directional axis respectively, and the second reflector can rotate about a third directional axis and a fourth directional axis respectively. The first directional axis and the second directional axis are perpendicular to each other, and the third directional axis and the fourth directional axis are perpendicular to each other.

3. The optical waveguide coupling system according to claim 1, characterized in that, It also includes a first beam splitting structure, wherein the first beam splitting structure is disposed between the beam adjustment module and the coupling module; the first beam splitting structure is used to split a portion of the beam to the monitoring module.

4. The optical waveguide coupling system according to claim 1, characterized in that, It also includes a power detection module for determining the coupling efficiency of the beam.

5. The optical waveguide coupling system according to claim 4, characterized in that, The power detection module includes a first power detector and a second power detector. The first power detector is located between the beam adjustment module and the coupling module and is used to determine the optical power of the beam entering the coupling module. The second power detector is located at the end of the optical waveguide and is used to determine the optical power of the beam coupled to the optical waveguide.

6. The optical waveguide coupling system according to claim 5, characterized in that, It also includes a second beam splitting structure, which is disposed between the beam adjustment module and the coupling module; the second beam splitting structure is used to split a portion of the beam to the first power detector.

7. An optical waveguide coupling method, characterized in that, The method, applied to the optical waveguide coupling system according to any one of claims 1 to 6, comprises: The light source module is controlled to emit a light beam. After passing through the light beam adjustment module, part of the emitted light beam enters the monitoring module, and part of the light beam enters the coupling module. The monitoring module is controlled to monitor the transmission direction of the beam after it has been adjusted by the beam adjustment module, and to generate monitoring results; Based on the monitoring results, the adjustment strategy for the beam is determined.

8. The method according to claim 7, characterized in that, The step of determining the beam adjustment strategy based on the monitoring results includes: The monitoring results determine whether the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction. If the monitoring results indicate that the transmission direction of the beam adjusted by the beam adjustment module is consistent with the target transmission direction, then no adjustment of the beam is required. If the monitoring results indicate that the transmission direction of the beam adjusted by the beam adjustment module is inconsistent with the target transmission direction, then based on the monitoring results, the beam adjustment module is controlled to adjust the transmission direction of the beam to the target transmission direction.

9. The method according to claim 8, characterized in that, The beam adjustment module includes a first reflector and a second reflector. Based on the monitoring results, controlling the beam adjustment module to adjust the beam to the target transmission direction includes: controlling the beam adjustment module to perform at least one cycle until the propagation direction of the beam is adjusted to the target transmission direction. Each of the aforementioned loops includes: Adjust the reflection angles of the first and second reflectors on the light beam to reduce the angular deviation between the light beam after passing through the coupling module and the incident end face of the optical waveguide; Adjust the reflection angle of the second reflector to reduce the distance between the point on the incident end face of the optical waveguide after the beam passes through the coupling module and the target point on the incident end face of the optical waveguide.

10. An imaging system, characterized in that, Includes the optical waveguide coupling system as described in any one of claims 1 to 6.

Images