Mobile optical communication receiving system, aiming method and device, and storage medium

Abstract

The present invention discloses a mobile optical communication receiving system, aiming method and equipment, and storage medium. The system includes a deflection element, a focusing element array, a light guide unit array, an optical gating device, and a communication device. The deflection element obtains light from the outside world and reflects the light to the focusing element array. Any focusing element in the focusing element array converges the light incident on the focusing element and makes it incident on the corresponding light guide unit in the light guide unit array. Any light guide unit transmits the light incident on the light guide unit to the optical gating device. The optical gating device selects the output light beam of any light guide unit, so that the selected light beam is incident on the communication device. The communication device is used to transmit the received light beam. By rotating the deflection element, the deflection element can reflect the light to the focusing element, and the output light beam of the corresponding light guide unit is selected by the optical gating device, thereby realizing the capture, aiming, and tracking of the light beam. The mobile optical communication receiving system has a simple structure and a high degree of integration.

Description

Technical Field

[0001] The present invention relates to the field of optical communications, and in particular to a mobile optical communication receiving system. The present invention also relates to a method and device for aiming a mobile optical communication receiving system. The present invention also relates to a computer-readable storage medium. Background Art

[0002] Free-space optical communication, also known as wireless optical communication, uses lasers as information carriers to directly transmit data, voice, video, and other signals in space. Wireless optical communication technology, which does not require a radio frequency license, features small equipment size, low power consumption, lightweight, strong confidentiality, and strong resistance to electromagnetic interference. These unique features make wireless optical communication a key component of future 6G communications. As communication technology evolves toward higher capacity and longer distances, wireless optical communication holds broad application prospects and is a current research hotspot in optical communication technology.

[0003] Free-space optical communication is a line-of-sight technology that uses modulated light to transmit data between stationary or mobile base stations. With the application of 5G Internet of Things (IoT) technology and the advancement of the digitalization, networking, and intelligentization of the Internet, the interconnection of people, networks, and things, as well as the convergence of systems across industries and regions, the volume of information transmission is growing exponentially. However, due to the limitations of wireless spectrum network bandwidth, traditional microwave communication methods are increasingly unable to meet the demands of modern communications in the wireless communications field. As a supplement to wireless spectrum communications, free-space optical communication has attracted considerable attention, demonstrating its unique advantages in specialized applications such as high-speed trains, drones, inter-building networks, satellites, indoor and outdoor local and wide area networks, deep space communications (e.g., quantum satellite communication with Micius), temporary optical communications in deep mountains where cable laying is inconvenient, and underwater wireless optical communications. Free-space optical communication can be used as a standalone communication system or in conjunction with radio frequency systems. It offers advantages such as high bandwidth, unlicensed spectrum usage, wide operating range, spatial overlap, security, and resistance to electromagnetic interference. However, because the transmission medium laser is a narrow beam with strong directivity and cannot diffract, it requires extremely precise alignment and tracking. Therefore, mobile optical communication has always been a challenge for free-space optical communication.

[0004] Free-space optical communication technology necessitates the establishment of an aiming, acquisition, and tracking (ATP) system. ATP technology is key to mobile free-space optical communication and essential for effective mobile optical communications. Currently, the overall workflow for electro-optical tracking and aiming is divided into five stages: guidance and pointing, acquisition alignment, coarse tracking, fine tracking, and communication. External guidance typically utilizes GPS / INS and ephemeris data to place both communicating parties within a small uncertainty zone. A coarse beacon beam is then emitted and scanned, and acquisition is completed when the beacon beam enters the other party's acquisition field of view. Coarse tracking, with a large field of view and low precision, typically utilizes a two-dimensional dynamic turntable to steer the beam for reception. Large-field-of-view detectors such as CCDs provide feedback, but this lacks accuracy and cannot meet the requirements of dynamic communication. Therefore, aiming and fine tracking are necessary. This involves coarse and fine decoupling, followed by the use of stepping or rotating piezoelectric ceramic or micro-electromechanical mirrors for more precise adjustment, using position feedback sensors such as PSDs.

[0005] Common mobile optical communication systems are integrated transmitters and receivers. Guidance and pointing utilize GPS or ephemeris information from satellite status. Attitude and positioning information is relatively coarse, providing only a general reference for the initial scan area; further scanning is required for capture. Coarse tracking often utilizes two single-dimensional turntables for two-dimensional steering control. These devices are bulky and heavy, resulting in low steering and positioning accuracy and slow speed changes. In conjunction with fine tracking devices using piezoelectric ceramics or microelectromechanical systems, error calculation and capture and tracking loop control are required. Simultaneous tracking utilizes a beacon light system, encompassing a complete set of optical transmission, steering, reception, and feedback devices, along with a comprehensive set of signal light devices. Assembly requires coaxial control, filtering, and isolation, making the overall system complex and challenging to design, assemble, and verify. This high cost, bulk, assembly difficulty, and debugging significantly limit its application. Summary of the Invention

[0006] The present invention aims to provide a mobile optical communication receiving system that can capture, aim, and track light beams, with a simple structure and a high degree of integration. The present invention also provides an aiming method and device for the mobile optical communication receiving system, as well as a computer-readable storage medium.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A mobile optical communication receiving system includes a deflection element, a focusing element array, a light guide unit array, an optical gating device, and a communication device. The deflection element is used to capture light from the outside world and reflect the captured light to the focusing element array. The deflection element is rotatable so that the light captured by the deflection element can be reflected to the focusing element array.

[0009] The light guiding units of the light guiding unit array correspond one to one with the focusing elements of the focusing element array. Any focusing element of the focusing element array is used to converge the light incident on the focusing element and then incident on the corresponding light guiding unit in the light guiding unit array. Any light guiding unit is used to transmit the light incident on the light guiding unit to the light gating device. The light gating device is used to select the output light beam of any light guiding unit so that the selected light beam is incident on the communication device. The communication device is used to transmit the received light beam.

[0010] Optionally, the optical center of each focusing element of the focusing element array is located on a first preset surface, and the first preset surface is a concave surface relative to the deflection element.

[0011] Optionally, the optical center of the light input end of each light guide unit in the light guide unit array is on a second preset surface, the second preset surface is a curved surface, and the position and shape of the second preset surface satisfy that the light converged by the focusing element is vertically incident on the light input end of the corresponding light guide unit.

[0012] Optionally, the optical center of the deflection element coincides with the curvature center of the first preset surface.

[0013] Optionally, the distance between the light input end of the light guide unit and the corresponding focusing element is smaller than the focal length of the corresponding focusing element.

[0014] Optionally, the light guiding unit includes a plurality of optical fibers, and the plurality of optical fibers form an optical fiber array.

[0015] Optionally, the light guiding unit further includes a beam combiner, and the beam combiner includes a light output channel formed by fusing the light output ends of the multiple parallel optical fibers.

[0016] Optionally, it also includes:

[0017] A light splitting device is provided on the light output path of the light gating device, and is used to split the output light beam selected by the light gating device into one light beam incident on the communication device, and split another light beam incident on the detection device;

[0018] The detection device is used to detect the light intensity of the received light beam;

[0019] The control device is respectively connected to the deflection element, the light gating device and the detection device for controlling the rotation of the deflection element, controlling the light gating device to select the output light beam of any of the light guide units and obtaining the light intensity information detected by the detection device.

[0020] A method for aiming a mobile optical communication receiving system is applied to the mobile optical communication receiving system described above, and the method comprises:

[0021] Step S1: When the deflection element is in a current posture, controlling the light gating device to sequentially gate the output light beams of the respective light guide units in the light guide unit array, and detecting the light intensity of the output light beam gated by the light gating device when the light gating device gates the output light beam of any light guide unit;

[0022] Step S2: finding the maximum light intensity and the corresponding light guide unit according to the light intensity information corresponding to each light guide unit in the light guide unit array, denoted as a first light intensity maximum and a target light guide unit, respectively, and determining whether the first light intensity maximum is greater than a threshold;

[0023] If the maximum value of the first light intensity is greater than the threshold, then based on the current posture of the deflection element, finding the target posture of the deflection element that maximizes the detected light intensity when the light gating device selects the output light beam of the target light guide unit, and using the target light guide unit and the target posture as aiming state parameters of the mobile optical communication receiving system;

[0024] If the first light intensity maximum value is not greater than the threshold value, the deflection element is controlled to change its posture and the process goes to step S1.

[0025] Optionally, based on the current posture of the deflection element, finding a target posture of the deflection element that maximizes the detected light intensity when the light gating device gates the output light beam of the target light guide unit includes:

[0026] Control the light gating device to select the output light beam of the target light-guiding unit, control the deflection element to change the posture a preset number of times according to the first method, detect and obtain the light intensity of the output light beam selected by the light gating device when the deflection element is in each posture, find the maximum light intensity and obtain the corresponding posture of the deflection element based on the light intensity information corresponding to each posture, which are respectively expressed as the second light intensity maximum value and the target posture.

[0027] A mobile optical communication receiving system aiming device, comprising:

[0028] Memory for storing computer programs;

[0029] The processor is configured to implement the steps of the mobile optical communication receiving system aiming method as described above when executing the computer program.

[0030] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned aiming method for a mobile optical communication receiving system.

[0031] It can be seen from the above technical solution that the mobile optical communication receiving system provided by the present invention includes a deflection element, a focusing element array, a light guide unit array, an optical gating device and a communication device. The deflection element is used to obtain light from the outside world and reflect the obtained light to the focusing element array. The light guide units of the light guide unit array correspond one-to-one to the focusing elements of the focusing element array. Any focusing element of the focusing element array is used to converge the light incident on the focusing element and make it incident on the corresponding light guide unit in the light guide unit array. Any light guide unit transmits the light incident on the light guide unit to the optical gating device. The optical gating device is used to select the output light beam of any light guide unit so that the selected light beam is incident on the communication device. The communication device is used to transmit the received light beam. Among them, the deflection element is rotatable. By rotating the deflection element, the light from the outside world obtained by the deflection element can be reflected by the deflection element and then incident on the focusing element, and the output light beam of the corresponding light guide unit can be selected through the light selection device, so that the selected light beam is incident on the communication device, thereby realizing the capture, aiming and tracking of the light beam. The mobile optical communication receiving system of the present invention has a simple structure and a high degree of integration.

[0032] The present invention provides a mobile optical communication receiving system aiming method and device, and a computer-readable storage medium, which can obtain light from the outside world by rotating a deflection element, and control a light gating device to select the output light of each light-guiding unit in the light-guiding unit array. According to the detection results, the light beam can be captured, aimed and tracked. The mobile optical communication receiving system has a simple structure and a high degree of integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of a mobile optical communication receiving system provided by one embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a mobile optical communication receiving system provided by yet another embodiment of the present invention;

[0036] Figure 3This is a projection diagram of three groups of optical fiber arrays of a light guide unit array on a focusing element array according to an embodiment of the present invention;

[0037] Figure 4-1 A light path diagram of light converging through a focusing element to a light-incoming end of a light-guiding unit in one embodiment of the present invention;

[0038] Figure 4-2 Schematic diagram of the relative positions of the light spot and the light inlet end of the light guide unit when light is obliquely incident on the focusing element in one embodiment of the present invention;

[0039] Figure 5 is a schematic diagram of a beam combiner of a light guide unit according to an embodiment of the present invention;

[0040] Figure 6 A flowchart of a method for aiming a mobile optical communication receiving system provided by one embodiment of the present invention;

[0041] Figure 7 A flowchart of a method for aiming a mobile optical communication receiving system is provided in accordance with another embodiment of the present invention.

[0042] The reference numerals in the drawings of the specification include:

[0043] 101-deflection element, 102-focusing element array, 103-focusing element, 104-light guiding unit array, 105-light guiding unit, 106-optical gating device, 107-communication device, 108-beam combiner, 109-spectrometric device, 110-detection device, 111-control device, 112-optical fiber. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0045] Please refer to Figure 1 , Figure 1 A schematic diagram of a mobile optical communication receiving system provided in one embodiment is shown. As shown in the figure, the mobile optical communication receiving system includes a deflection element 101, a focusing element array 102, a light guide unit array 104, an optical gating device 106, and a communication device 107. The deflection element 101 is used to capture light from the outside world and reflect the captured light to the focusing element array 102. The deflection element 101 is rotatable so that the light captured by the deflection element 101 can be reflected to the focusing element array 102.

[0046] The light guiding units 105 of the light guiding unit array 104 correspond one-to-one to the focusing elements 103 of the focusing element array 102. Any of the focusing elements 103 of the focusing element array 102 is used to converge the light incident on the focusing element 103 and then incident on the corresponding light guiding unit 105 in the light guiding unit array 104. Any of the light guiding units 105 is used to transmit the light incident on the light guiding unit 105 to the light gating device 106. The light gating device 106 is used to select the output light beam of any of the light guiding units 105, so that the selected light beam is incident on the communication device 107. The communication device 107 is used to transmit the received light beam.

[0047] The deflection element 101 receives light from the outside world and reflects it. The deflection element 101 is rotatable, and this rotation can change the direction of reflection of light incident on the deflection element 101. By rotating the deflection element 101, light received by the deflection element 101 can be reflected by the deflection element 101 and then incident on the focusing element array 102.

[0048] Any focusing element 103 of the focusing element array 102 converges the light incident thereon and makes it incident on the corresponding light guide unit 105 in the light guide unit array 104 . Any light guide unit 105 transmits the light incident thereon to the light gating device 106 .

[0049] The mobile optical communication receiving system of this embodiment can rotate the deflection element so that the light from the outside world obtained by the deflection element is reflected by the deflection element and then incident on the focusing element, and the output light beam of the corresponding light guide unit is selected by the optical selection device, so that the selected light beam is incident on the communication device, thereby realizing the capture, aiming and tracking of the light beam. The mobile optical communication receiving system of this embodiment has a simple structure and a high degree of integration.

[0050] In this embodiment, the structure of the deflection element 101 is not limited; it only needs to be able to receive and reflect light from the outside world and rotate to change the direction of the reflected light. The deflection element 101 can be, but is not limited to, a controllable deflection mirror. The controllable deflection mirror can be an electrostatically driven deflection mirror, a piezoelectric ceramic closed-loop deflection mirror, or a deflection mirror controlled by a two-dimensional voice coil motor.

[0051] Preferably, in some embodiments, the optical center of each focusing element 103 of the focusing element array 102 is located on a first preset surface, which is a curved surface. The position and shape of the first preset surface ensure that, after the light captured by the deflection element 101 is reflected by the deflection element 101, the reflected light can be perpendicularly incident on the corresponding focusing element 103. Setting the optical centers of each focusing element 103 of the focusing element array 102 to be located on the same curved surface, and ensuring that, after the light captured by the deflection element 101 is reflected by the deflection element 101, each portion of the reflected light can be perpendicularly incident on the corresponding focusing element 103, allows the system to effectively receive light, improves the system's efficiency in capturing light beams, and enhances aiming accuracy.

[0052] The first preset surface may be a concave surface relative to the deflection element 101. Specifically, the optical center of the deflection element 101 may coincide with the curvature center of the first preset surface, that is, relative to the deflection element 101, the first preset surface is a concave surface, and the optical center of each focusing element 103 of the focusing element array 102 is located on the concave surface. For example, reference may be made to Figure 2 , Figure 2 A schematic diagram of a mobile optical communication receiving system is provided as another embodiment. As shown, the focusing elements 103 of the focusing element array 102 can be arranged in a concave shape. This creates an inner-curved focusing element array. This, combined with the deflection element 101's orientation adjustment, facilitates vertical incidence of light and allows adjustment of the light's angle of incidence on the deflection element 101 within the field of view. However, if the focusing elements 103 of the focusing element array 102 are arranged in a convex shape relative to the deflection element 101, the focusing element array 102 forms an outer-curved array. This outer-curved array exhibits passive reception and cannot adjust to the angle of incidence. Microlenses can be used as the focusing elements 103, and the corresponding focusing element array 102 forms an inner-curved microlens array.

[0053] It is further preferred that the optical center of the light input end of each of the light guide units 105 of the light guide unit array 104 is on a second preset surface, the second preset surface is a curved surface, and the position and shape of the second preset surface satisfy the requirement that the light converged by the focusing element 103 is vertically incident on the light input end of the corresponding light guide unit 105. The optical centers of the light input ends of each of the light guide units 105 of the light guide unit array 104 are arranged on the same curved surface, so that the light converged and emitted by the focusing element 103 is vertically incident on the light input end of the corresponding light guide unit 105, so that the system effectively receives light, improves the efficiency of the system in capturing light beams, and improves the accuracy of aiming. The radius of curvature of the second preset surface may be the same as the radius of curvature of the first preset surface. Specifically, the second preset surface may be a concave surface relative to the deflection element 101, and the optical centers of each of the light guide units 105 of the light guide unit array 104 are on the concave surface. For example, reference may be made to Figure 2As shown, the light inlet ends of the light guide units 105 of the light guide unit array 104 may be arranged to form a concave surface.

[0054] In this embodiment, the structure of the light guide unit 105 is not limited, as long as it can transmit the light incident on the light guide unit 105 to the light gating device 106. In some embodiments, the light guide unit 105 includes multiple optical fibers, and the multiple optical fibers form an optical fiber array. Preferably, the multiple optical fibers include a central optical fiber and optical fibers surrounding the central optical fiber. For example, reference can be made to Figure 3 , Figure 3 This is a projection diagram of three groups of optical fiber arrays of a light guiding unit array on a focusing element array in one embodiment. As shown in the figure, the focusing element array 102 includes multiple focusing elements 103. A group of optical fiber arrays corresponds to each focusing element 103. Each group of optical fiber arrays is formed by multiple optical fibers 112, serving as a light guiding unit 105. Each group of optical fiber arrays includes a central optical fiber and optical fibers surrounding the central optical fiber.

[0055] Since fiber coupling is sensitive to angle and has a relatively small numerical aperture, if the light guiding unit 105 adopts a fiber array, using a large-aperture focusing element 103 for the focusing element 103 does not improve the light coupling efficiency. The focusing element 103 can adopt a microlens, and the effective aperture of the unit lens (i.e., the focusing element) of the curved microlens array can be designed according to the numerical aperture of the optical fiber. The number of focusing elements in the focusing element array under a certain receiving aperture can be further calculated.

[0056] During design, the effective aperture and focal length of the focusing element 103 can be calculated based on the numerical aperture of the optical fiber 112. When the incident light is perpendicularly incident on the focusing element 103 and the outgoing light of the focusing element 103 is perpendicularly incident on the corresponding optical fiber array, the incident light can be approximately considered as a paraxial light. The relationship between the F-number of the focusing element 103 and the numerical aperture NA of the optical fiber 112 can be approximately expressed as:

[0057] ;

[0058] Where F represents the F number of the focusing element 103, f represents the focal length of the focusing element 103, D represents the effective aperture of the focusing element 103, and NA represents the numerical aperture of the optical fiber 112. For example, using a multimode optical fiber with a 50 μm / 125 μm (inner diameter / outer diameter) and a numerical aperture of approximately 0.22, when the focal length of the lens is set to 5 mm, the effective aperture size is approximately 2.2 mm. The optical fiber spacing of the densely packed optical fiber array is controlled at approximately 150 μm. Such a lens corresponds to an array of multiple optical fibers. The approximate distribution can be referred to Figure 3 shown.

[0059] For each group of optical fiber arrays, the light inlet ends of the multiple optical fibers included in a group of optical fiber arrays can be, but are not limited to, a square array or a circular array, such as a 3*3 square array. In order to make the light incident vertically, the light inlet ends of each group of optical fiber arrays are arranged into a curved surface, specifically arranged into a concave surface relative to the deflection element 101. In practical applications, high-precision optical fiber positioning hole plates can be made to assemble and fix the optical fiber arrays. Specifically, photolithography technology can be used to make high-precision optical fiber positioning hole plates, and the optical fiber positioning hole plates are used to accurately position one end of all optical fibers, so that a group of optical fibers corresponding to the same focusing element 103 are closely arranged. The optical fiber can be single-mode or multi-mode. For example, the outer diameter of the optical fiber is 125um, and the optical fiber spacing in a group of optical fiber arrays corresponding to the same focusing element 103 is 150um. The outermost layer of the optical fiber can be wrapped with protective material, and the interface used to connect the optical fiber can be a standard optical fiber interface such as FC / PC.

[0060] Preferably, in some embodiments, the distance between the light input end of the light guide unit 105 and the corresponding focusing element 103 is less than the focal length of the corresponding focusing element 103. In this embodiment, when the incident light is incident vertically onto the focusing element 103, the center of the light spot formed at the light input end of the optical fiber array coincides with the center of the light input end of the optical fiber array. In this case, the light energy coupled into the light guide unit 105 is the largest, specifically, the energy passing through the center optical fiber plus the energy coupled by the edge optical fiber, thereby maximizing the energy value. If the incident light is not incident vertically onto the focusing element 103, that is, the incident angle of the incident light onto the focusing element 103 is greater than 0 degrees, which is oblique incidence, then the light spot incident on the light input end of the optical fiber array does not completely cover the light input ends of all optical fibers in the optical fiber array, and the light energy is collected by the optical fibers covered by the light spot.

[0061] For example, please refer to Figure 4-1 and Figure 4-2 , Figure 4-1 This is a light path diagram of light converging from a focusing element to the light inlet end of a light guide unit in one embodiment. Figure 4-2 FIG. 1 is a schematic diagram showing the relative positions of the light spot and the light inlet end of the light guide unit when light is incident obliquely on the focusing element in one embodiment. Figure 4-1 As shown, if the light-incoming end of the light-guiding unit 105 is located on the defocusing surface of the focusing element 103, when the light is incident, the light spot always completely covers the diffuse spot converged by the focusing element 103. Figure 4-1 and Figure 4-2 As shown in the figure, if the incident angle of the light is greater than 0 degrees, the energy is collected by the optical fiber covered by the light spot, keeping the link smooth within the energy detectable threshold and increasing the field of view. The specific maximum half field of view angle of reception can be expressed as follows:

[0062] ;

[0063] Among them, θmax Indicates the maximum half-viewing angle of reception, Δ x represents the distance between the light input end of the light guide unit 105 and the corresponding focal plane of the focusing element 103, that is, the defocus of the light input end of the light guide unit 105, f represents the focal length of the focusing element 103, D represents the effective aperture of the focusing element 103, and R represents the radius of the light spot received at the focal plane of the focusing element 103 when light is incident on the focusing element 103. Therefore, during design, the effective aperture and focal length of the focusing element 103 can be determined based on the numerical aperture of the optical fiber used. Furthermore, by setting the distance between the light input end of the light guide unit 105 and the corresponding focal plane of the focusing element 103, the mobile optical communication receiving system can achieve the required maximum half-field-of-view (HFOV) angle, ensuring that the field-of-view angle of the mobile optical communication receiving system meets the application requirements.

[0064] The light guide unit 105 may further include a beam combiner, wherein the beam combiner includes a light output channel formed by fusing the light output ends of the plurality of parallel optical fibers. The light output ends of the plurality of parallel optical fibers of the light guide unit 105 are fused to form the same light output channel, so that the light received by each optical fiber is emitted through the light output channel to form an output light beam of the light guide unit 105. For example, reference may be made to Figure 2 Each light guide unit 105 includes a beam combiner 108, and each light guide unit 105 is connected to the light gating device 106 via the corresponding beam combiner 108. For example, please refer to Figure 5 , Figure 5 This is a schematic diagram of a combiner of a light guide unit of an embodiment, which is manufactured based on a fused tapered optical fiber bundle. The optical fiber coating is removed and then arranged in a certain manner. It is heated at a high temperature to melt it, and at the same time, the optical fiber bundle is stretched in opposite directions to melt it into a fused tapered optical fiber bundle.

[0065] In this embodiment, the structure of the optical gating device 106 is not limited. The optical gating device 106 can be an optical switch, including a micro-electro-mechanical system (MEMS), a prism, or a 1xN-way optical switch using a micro-nano mechanism. It preferably requires low latency and insertion loss, and can be cascaded to obtain more parallel ports, so that light beams input from N ports can be efficiently output from the output port. The communication device 107 can be an optical module.

[0066] In some embodiments, the mobile optical communication receiving system further includes: a light splitting device, arranged on the light output path of the optical gating device 106, for splitting the output light beam selected by the optical gating device 106 into one light beam incident on the communication device 107, and splitting another light beam incident on the detection device; the detection device is used to detect the light intensity of the received light beam; a control device, respectively connected to the deflection element 101, the optical gating device 106 and the detection device for controlling the rotation of the deflection element 101, controlling the optical gating device 106 to select the output light beam of any of the light guide units 105, and obtaining the light intensity information detected by the detection device. For example, please refer to Figure 2 The optical splitter 109 is disposed on the light output path of the optical gating device 106 and is connected to the communication device 107 and the detection device 110. The optical splitter 109 splits the output light beam selected by the optical gating device 106 into one beam incident on the communication device 107 and another beam incident on the detection device 110. The control device 111 is in communication with the deflection element 101, the optical gating device 106, and the detection device 110.

[0067] In this embodiment, the type and structure of the spectrometer 109 or the detector 110 are not limited. The spectrometer 109 can split light in proportion. The control device 111 can be, but is not limited to, a microcontroller unit (MCU).

[0068] In one specific example, the emission source laser has a wavelength of 1550nm, collimated using a single-mode optical fiber and a collimating lens. The beam waist diameter is 3.49mm, the divergence angle is 0.565mrad, and the transmission distance is 3m to 5m. The deflection element 101 utilizes an electrostatically driven deflection mirror, such as the American Mirrorcle A8L2.2-5000AU-TINY48.4. The mirror has a diameter of 5mm and is gold-plated. The mechanical deflection angle is + / -5°, and the optical deflection angle is + / -10°. It is electrostatically driven and can be maintained at a specific angle. Other options include piezoelectric ceramic closed-loop deflection mirrors, such as the Core Mingtian E70. This has the advantage of being able to accommodate large-area reflectors, but the disadvantage is a smaller angle. Alternatively, a deflection mirror controlled by a two-dimensional voice coil motor can be used. This can provide a larger reflector area, for example, with a diameter of 50.8mm or even higher, but the disadvantage is lower precision.

[0069] Furthermore, the simulation and manufacturing of curved microlens arrays can utilize the current high-precision ultra-precision CNC machine tools in the manufacturing field, using natural single-crystal diamond tools to achieve ultra-precision one-step molding of complex three-dimensional surfaces with high precision and good stability, and a surface roughness of up to 3nm. Materials such as aluminum, nickel, gold, germanium, zinc selenide, zinc sulfide, and resins (such as PMMA) can be processed. The company has the ability to manufacture various ultra-precision core components such as plane mirrors, spherical mirrors, concave-convex aspheric mirrors, off-axis aspheric mirrors, aspheric array mirrors, Fresnel mirrors, micro-groove arrays, and faceted prisms, as well as molds for optical glass molding and injection molding of various sizes. Therefore, the processing of curved microlens arrays is feasible and its application is valuable.

[0070] Curved fiber array manufacturing: The existing manufacturing process has the ability to manufacture curved fiber arrays, and has the ability to process curved fiber arrays with sub-micron arrangement accuracy based on unique designs.

[0071] Fiber coupling technology: The coupling of single-mode optical fibers requires precise angular alignment and position alignment. In practical applications, a 6-dimensional precision moving stage and two mirrors are often used to achieve 6 degrees of freedom adjustment.

[0072] The mobile optical communication receiving system of this embodiment can achieve the following beneficial effects: a) It has a simple structure and uses multiple fiber-optic optoelectronic devices, resulting in a high degree of integration and facilitating integration and miniaturization. b) The microlens array can be manufactured by die-casting in the later stage, which can greatly reduce costs. c) The incident angle can be easily adjusted, which is beneficial for fiber coupling and fiber integration. In addition, in the present invention, the rotation of the reflector is used to achieve angle adjustment in the X and Y directions. The center of the reflector is located at the center of the curved microlens array, thereby achieving vertical angle incidence. The information of the optical switch is used to determine the incident angle information, and the reflector is fine-tuned to achieve higher coupling efficiency.

[0073] This embodiment also provides a mobile optical communication receiving system aiming method, which is applied to the mobile optical communication receiving system described in any of the above embodiments. Figure 6 , Figure 6 A flowchart of a method for aiming a mobile optical communication receiving system is provided in accordance with an embodiment, comprising the following steps:

[0074] S201: When the deflection element 101 is in the current posture, the light gating device 106 is controlled to sequentially select the output light beams of each of the light guide units 105 of the light guide unit array 104, and when the light gating device 106 selects the output light beam of any of the light guide units 105, the light intensity of the output light beam selected by the light gating device 106 is detected.

[0075] When the deflection element 101 is in the current posture, the light gating device 106 is controlled to sequentially select the output light beams of each light guide unit 105 of the light guide unit array 104. For each light guide unit 105, when the light gating device 106 selects the output light beam of the light guide unit 105, the light intensity of the output light beam selected by the light gating device 106 is detected.

[0076] S202 : Finding a maximum light intensity and the corresponding light guide unit 105 according to the light intensity information corresponding to each light guide unit 105 of the light guide unit array 104 , which are represented as a first maximum light intensity and a target light guide unit, respectively.

[0077] S203: Determine whether the maximum value of the first light intensity is greater than a threshold.

[0078] If the first light intensity maximum value is greater than the threshold, the process proceeds to step S204.

[0079] If the first light intensity maximum value is not greater than the threshold, the process proceeds to step S205.

[0080] S204: Based on the current posture of the deflection element 101, find out the target posture of the deflection element 101 that maximizes the light intensity obtained by detection when the light selecting device 106 selects the output light beam of the target light guide unit, and use the target light guide unit and the target posture as aiming state parameters of the mobile optical communication receiving system.

[0081] S205: Control the deflection element 101 to change its posture and enter step S201.

[0082] If the maximum first light intensity value is greater than a threshold, indicating that the light intensity obtained by the deflection element 101 in its current posture meets the required value, the current posture of the deflection element 101 is then used to determine the posture of the deflection element 101 that maximizes the detected light intensity when the light gating device 106 selects the output light beam of the target light guide unit. This posture is used as the target posture of the deflection element 101. The target light guide unit and the target posture are then used as aiming state parameters of the mobile optical communication receiving system, causing the mobile optical communication receiving system to receive light using the target posture and the target light guide unit.

[0083] If the maximum value of the first light intensity is not greater than the threshold, it indicates that the light intensity obtained by the deflection element 101 in the current posture cannot meet the requirements, then the deflection element 101 is controlled to change its posture, and after the deflection element 101 changes its posture, each light-guiding unit 105 of the light-guiding unit array 104 is re-traversed to detect the light intensity received by each light-guiding unit 105.

[0084] The aiming method of the mobile optical communication receiving system of this embodiment rotates a deflecting element to capture light from the outside world, controls a light gating device to select the output light from each light-guiding unit in the light-guiding unit array, and then captures, aims at, and tracks the light beam based on the detection results. The mobile optical communication receiving system of this embodiment has a simple structure and a high degree of integration.

[0085] In this embodiment, the specific value of the threshold is not limited. In practical applications, it can be set according to the light detection conditions of the mobile optical communication receiving system.

[0086] In the step S204, based on the current posture of the deflection element 101, finding out the target posture of the deflection element 101 that maximizes the light intensity obtained by detection when the light gating device 106 selects the output light beam of the target light-guiding unit includes: controlling the light gating device 106 to select the output light beam of the target light-guiding unit, controlling the deflection element 101 to change its posture a preset number of times according to a first method, detecting and obtaining the light intensity of the output light beam selected by the light gating device 106 when the deflection element 101 is in each posture, finding out the maximum light intensity and obtaining the corresponding posture of the deflection element 101 according to the light intensity information corresponding to each posture, which are respectively expressed as the second light intensity maximum value and the target posture.

[0087] For further reference Figure 7 , Figure 7 A flowchart of a method for aiming a mobile optical communication receiving system is provided in another embodiment. As shown in the figure, step S204 includes the following steps:

[0088] S2041: Control the light gating device 106 to select the output light beam of the target light-guiding unit, control the deflection element 101 to change the posture a preset number of times according to the first method, and detect the light intensity of the output light beam selected by the light gating device 106 when the deflection element 101 is in each posture.

[0089] S2042: According to the light intensity information corresponding to each posture, find the maximum light intensity and obtain the corresponding posture of the deflection element 101, which are represented as the second maximum light intensity and the target posture respectively.

[0090] The light gating device 106 is controlled to gate the output light beam of the target light guide unit. Based on the current posture of the deflection element 101, the deflection element 101 is controlled to change its posture a preset number of times according to a first method. Each time the deflection element 101 changes its posture, the light intensity of the output light beam selected by the light gating device 106 is detected. For example, if the preset number is M, the deflection element 101 will traverse M postures in this process.

[0091] Controlling the deflection element 101 to change its posture a preset number of times in accordance with the first method includes: during the deflection element 101 changing its posture the preset number of times, the deviation between the posture of the deflection element 101 after any of the changes is less than a preset deviation from the initial posture, where the initial posture is the posture of the deflection element 101 before the deflection element 101 is controlled to change its posture the preset number of times. The first method is to fine-tune the posture of the deflection element 101.

[0092] In some embodiments, controlling the deflection element 101 to change its posture in step S205 may be controlling the deflection element 101 to change its posture in a second manner. Controlling the deflection element 101 to change its posture in the second manner includes: a deviation between the posture of the deflection element 101 after the change and the posture before the change being greater than a preset deviation. The second manner is coarse adjustment of the posture of the deflection element 101.

[0093] The aiming method of the mobile optical communication receiving system of this embodiment uses energy comparison of the detector to obtain position information, rather than using a position detector for judgment, which is faster. Because traditional position judgment uses a combination of CCD and position sensor, the CCD requires an integration process and image recognition, and the position sensor is limited by the area and can generally only judge small angles. The energy judgment used in this solution only needs to determine whether the energy exceeds the judgment threshold of the detector. If it is lower than the threshold, the posture is adjusted. If it is higher than the threshold, the transmission is stabilized. This process greatly omits the judgment time, which greatly improves the possibility of mobile communication.

[0094] The defocus principle is used to increase the field of view. To keep the link smooth, energy transmission must be uninterrupted. At this time, this solution uses a fiber optic bundle to collect energy. When the incident light is normal, most of the energy is coupled by the central fiber. When the light is transmitted within the field of view, the edge fibers can also collect energy. This ensures that the link remains smooth during position adjustment.

[0095] This embodiment further provides a mobile optical communication receiving system aiming device, including:

[0096] memory for storing computer programs;

[0097] The processor is configured to implement the steps of the aiming method of the mobile optical communication receiving system as described in any of the above embodiments when executing the computer program.

[0098] The aiming device of the mobile optical communication receiving system of this embodiment rotates a deflecting element to capture light from the outside world. It then controls a light gating device to select the output light from each light-guiding unit in the light-guiding unit array. Based on the detection results, the device can capture, aim, and track the light beam. The mobile optical communication receiving system of this embodiment has a simple structure and a high degree of integration.

[0099] This embodiment further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the aiming method of the mobile optical communication receiving system as described in any of the above embodiments are implemented.

[0100] When executed by a processor, the computer program stored in the computer-readable storage medium of this embodiment can capture light from the outside world by rotating a deflection element, control a light gating device to select the output light from each light-guiding unit in the light-guiding unit array, and capture, aim, and track the light beam based on the detection results. The mobile optical communication receiving system of this embodiment has a simple structure and a high degree of integration.

[0101] The mobile optical communication receiving system, aiming method and device, and storage medium provided by the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A mobile optical communication receiving system, characterized in that: The device comprises a deflection element, a focusing element array, a light guide unit array, a light gating device, and a communication device. The deflection element is used to obtain light from the outside world and reflect the obtained light to the focusing element array. The deflection element is rotatable so that the light obtained by the deflection element can be reflected to the focusing element array. The light guide units of the light guide unit array correspond to the focusing elements of the focusing element array one by one. Any of the focusing elements of the focusing element array is used to converge the light incident on the focusing element and then make it incident on the corresponding light guide unit in the light guide unit array. Any of the light guide units is used to transmit the light incident on the light guide unit to the light gating device. The light gating device is used to gating the output light beam of any of the light guide units, so that the gated light beam is incident on the communication device. The communication device is used to transmit the received light beam. The invention also includes: a detection device for detecting the light intensity of the received light beam, wherein the light beam selected by the light selection device is split into a light beam and incident on the detection device; The control device is respectively connected to the deflection element, the light gating device and the detection device for controlling the rotation of the deflection element, controlling the light gating device to select the output light beam of any of the light guide units and obtaining the light intensity information detected by the detection device.

2. The mobile optical communication receiving system according to claim 1, wherein: The optical center of each focusing element of the focusing element array is located on a first preset surface, and the first preset surface is a concave surface relative to the deflection element.

3. The mobile optical communication receiving system according to claim 1 or 2, characterized in that: The optical center of the light input end of each light guide unit in the light guide unit array is located on a second preset surface, which is a curved surface. The position and shape of the second preset surface satisfy the requirement that the light converged by the focusing element is vertically incident on the light input end of the corresponding light guide unit.

4. The mobile optical communication receiving system according to claim 2, wherein: The optical center of the deflection element coincides with the curvature center of the first preset surface.

5. The mobile optical communication receiving system according to claim 1, wherein: The distance between the light input end of the light guide unit and the corresponding focusing element is smaller than the focal length of the corresponding focusing element.

6. The mobile optical communication receiving system according to claim 1, wherein: The light guiding unit includes a plurality of optical fibers, and the plurality of optical fibers form an optical fiber array.

7. The mobile optical communication receiving system according to claim 6, wherein: The light guiding unit further includes a beam combiner, and the beam combiner includes a light output channel formed by fusing the light output ends of the plurality of parallel optical fibers.

8. The mobile optical communication receiving system according to claim 1, wherein: Also includes: The optical splitter is arranged on the light output path of the optical gating device, and is used to split the output light beam selected by the optical gating device into one light beam incident on the communication device and another light beam incident on the detection device.

9. A method for aiming a mobile optical communication receiving system, applied to the mobile optical communication receiving system according to any one of claims 1 to 8, characterized in that: Methods include: Step S1: When the deflection element is in a current posture, controlling the light gating device to sequentially gate the output light beams of the respective light guide units in the light guide unit array, and detecting the light intensity of the output light beam gated by the light gating device when the light gating device gates the output light beam of any light guide unit; Step S2: finding the maximum light intensity and the corresponding light guide unit according to the light intensity information corresponding to each light guide unit in the light guide unit array, denoted as a first light intensity maximum and a target light guide unit, respectively, and determining whether the first light intensity maximum is greater than a threshold; If the maximum value of the first light intensity is greater than the threshold, then based on the current posture of the deflection element, finding the target posture of the deflection element that maximizes the detected light intensity when the light gating device selects the output light beam of the target light guide unit, and using the target light guide unit and the target posture as aiming state parameters of the mobile optical communication receiving system; If the first light intensity maximum value is not greater than the threshold value, the deflection element is controlled to change its posture and the process goes to step S1.

10. The aiming method of a mobile optical communication receiving system according to claim 9, characterized in that: Finding, based on the current posture of the deflection element, a target posture of the deflection element that maximizes the detected light intensity when the light gating device gates the output light beam of the target light guide unit comprises: Control the light gating device to select the output light beam of the target light-guiding unit, control the deflection element to change the posture a preset number of times according to the first method, detect and obtain the light intensity of the output light beam selected by the light gating device when the deflection element is in each posture, find the maximum light intensity and obtain the corresponding posture of the deflection element based on the light intensity information corresponding to each posture, which are respectively expressed as the second light intensity maximum value and the target posture.

11. A mobile optical communication receiving system aiming device, characterized in that: include: memory for storing computer programs; A processor, configured to implement the steps of the aiming method of the mobile optical communication receiving system as described in any one of claims 9 to 10 when executing the computer program.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the aiming method of the mobile optical communication receiving system according to any one of claims 9 to 10.

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