CN115941047A

CN115941047A - Mobile optical communication receiving system, aiming method and device, and storage medium

Info

Publication number: CN115941047A
Application number: CN202211557734.0A
Authority: CN
Inventors: 冯成义; 张在琛; 王寅; 陈声健; 陈传友; 袁云辉; 胡振国
Original assignee: Network Communication and Security Zijinshan Laboratory
Current assignee: Network Communication and Security Zijinshan Laboratory
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-04-07

Abstract

The invention discloses a mobile optical communication receiving system, an aiming method, a device and a storage medium, wherein the system comprises a deflection element, a focusing element array, a light guide unit array, an optical gating device and a communication device, the deflection element acquires light rays from the outside and reflects the light rays to the focusing element array, any focusing element of the focusing element array converges the light rays incident to the focusing element and transmits the light rays to a corresponding light guide unit in the light guide unit array, any light guide unit transmits the light rays incident to the light guide unit to the optical gating device, the optical gating device gates output light beams of any light guide unit to enable the gated light beams to be incident to the communication device, and the communication device is used for transmitting the received light beams. Through rotating the deflection element, can make the deflection element reflect light to focusing element, pass through the output light beam of the corresponding leaded light unit of light gating device gating, realize the capture, aim and the tracking to the light beam, this mobile optical communication receiving system simple structure integrates the degree height.

Description

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

Technical Field

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

Background

Free space optical communication refers to a communication technology that uses laser as an information carrier and directly transmits signals such as data, voice, video and the like in space, and is also called wireless optical communication. The wireless optical communication technology does not need radio frequency use permission, has small equipment volume, low power consumption, light weight, strong confidentiality, strong electromagnetic interference resistance and the like, has unique characteristics, leads the wireless optical communication technology to occupy a place for 6G future communication, has wide application prospect along with the development of the communication technology to a large capacity and a long distance direction, and is a research hotspot of the current optical communication technology.

Free space optical communication is a line-of-sight technique that transmits data between base stations in stationary or moving conditions by modulating light. With the technical application of 5G internet of things and the progress of internet digitization, networking and intellectualization, human-network-physical interconnection and system fusion of various areas of each industry, the information transmission amount is exponentially increased and limited by the bandwidth of a wireless spectrum network, and in the field of wireless communication, the traditional microwave communication means is increasingly difficult to meet the requirements of modern communication. As a complement to wireless spectrum communication, free space optical communication technology has attracted considerable attention, and in particular, in some special occasions, free space optical communication exhibits unique advantages, such as high-speed trains, unmanned aerial vehicles, inter-building, satellites, indoor and outdoor local area networks and wide area networks, and deep space communication, such as quantum satellite communication, china numbers, and temporary optical communication, underwater wireless optical communication, etc., which are inconvenient for stringing in deep mountains. Free space optical communication is a technology which can be used as an independent communication system, can also be used in combination with a radio frequency system, and has the advantages of high bandwidth, license-free band use, wide operation range, space overlapping, safety, electromagnetic interference resistance and the like. However, since transmission medium laser is a narrow beam, the beam directivity is strong, and diffraction is impossible, and extremely accurate alignment and tracking are required, mobile optical communication has been a challenge of free space optical communication.

Free space optical communication technology must establish a set of aiming, capturing and tracking system (ATP), which is the key of free space mobile optical communication technology and is necessary for effectively performing mobile optical communication. At present, the overall workflow of photoelectric tracking is mainly divided into five stages of guiding pointing, capturing alignment, coarse tracking, fine tracking and communication. External guidance generally uses GPS/INS, ephemeris, etc. to make both communication parties enter a small uncertain area, then emits coarse beacon light and scans, and when the beacon light enters the capture field of view of the other party, capture is completed. The rough tracking is large visual field and low precision, a two-dimensional dynamic turntable is generally used to enable a light beam to be turned and received, a CCD (charge coupled device) and other large visual field detectors determine feedback, the precision is insufficient, and the dynamic communication requirements cannot be met, so that aiming and precise tracking must be carried out, rough and precise decoupling must be carried out firstly, then more precise piezoelectric ceramic or micro-electromechanical reflectors are used for stepping or rotating, and PSD (position sensitive detector) position feedback sensors and other precise adjustment are utilized.

A common mobile optical communication system is integrated with a transceiver, a satellite state information GPS or an ephemeris is used for guiding and pointing, attitude information or positioning information is rough, a large direction reference can be provided for an initial scanning area, and further scanning is needed for capturing; the coarse tracking adopts two single-dimensional rotary tables to be matched for use to achieve two-dimensional steering control, the device is large and heavy, the steering positioning precision is low, and the change speed is slow. Meanwhile, the precise tracking device is matched with piezoelectric ceramics or micro electro mechanical systems, and error calculation and acquisition tracking circulation control are needed. Meanwhile, beacon light, namely a whole set of light emitting, steering, receiving, feedback and other devices are used for tracking, and the device is matched with a whole set of signal light device, coaxial control is needed for assembly, filtering, isolation and the like are needed, the whole device is very complex, the design, assembly and verification are very difficult, the cost is high, the size is large, the assembly difficulty and the debugging difficulty are high, and the application is very limited.

Disclosure of Invention

The invention aims to provide a mobile optical communication receiving system which realizes the capture, the aiming and the tracking of light beams, has simple structure and high integration degree. The invention also provides a mobile optical communication receiving system aiming method and equipment, and a computer readable storage medium.

In order to achieve the purpose, the invention provides the following technical scheme:

a mobile optical communication receiving system comprises a deflection element, a focusing element array, a light guide unit array, an optical gating device and a communication device, wherein the deflection element is used for acquiring light rays from the outside and reflecting the acquired light rays to the focusing element array;

the light guide unit of the light guide unit array corresponds to the focusing elements of the focusing element array one by one, any focusing element of the focusing element array is used for converging light rays incident to the focusing element and then incident to the corresponding light guide unit in the light guide unit array, any light guide unit is used for transmitting the light rays incident to the light guide unit to the light gating device, the light gating device is used for gating output light beams of any light guide unit and enabling the gated light beams to be incident to the communication device, and the communication device is used for transmitting the received light beams.

Optionally, each optical center of the focusing elements of the focusing element array is located on a first predetermined surface, and the first predetermined surface is a concave surface relative to the deflecting element.

Optionally, the optical center of the light inlet end of each light guide unit of the light guide unit array is located on a second preset surface, the second preset surface is a curved surface, and the position and the shape of the second preset surface meet the condition that light rays converged by the focusing element vertically enter the corresponding light inlet end of the light guide unit.

Optionally, the optical center of the deflection element coincides with the center of curvature of the first predetermined surface.

Optionally, a distance between the light entrance end of the light guide unit and the corresponding focusing element is smaller than a focal length of the corresponding focusing element.

Optionally, the light guiding unit comprises a plurality of optical fibers, the plurality of optical fibers forming an optical fiber array.

Optionally, the light guiding unit further includes a beam combiner, where the beam combiner includes an optical exit channel formed by fusing optical exit ends of the multiple parallel optical fibers.

Optionally, the method further comprises:

the light splitting device is arranged on a light emitting path of the light gating device and is used for splitting one path of light beam of the output light beam gated by the light gating device into the communication device and splitting the other path of light beam into the detection device;

the detection device is used for detecting the light intensity of the received light beam;

and the control device is respectively in communication connection with the deflection element, the light gating device and the detection device and is used for respectively controlling the deflection element to rotate, controlling the light gating device to gate the output light beam of any one light guide unit and acquiring light intensity information detected by the detection device.

A mobile optical communication receiving system aiming method, applied to the above mobile optical communication receiving system, the method comprising:

step S1: when the deflection element is in the current posture, controlling the optical gating device to gate the output light beams of all the light guide units of the light guide unit array in sequence, and detecting and obtaining the light intensity of the output light beams gated by the optical gating device when the optical gating device gates the output light beams of any one light guide unit;

step S2: finding out the maximum light intensity value and the corresponding light guide unit according to the light intensity information corresponding to each light guide unit of the light guide unit array, wherein the maximum light intensity value and the corresponding light guide unit are respectively represented as a first maximum light intensity value and a target light guide unit, and judging whether the first maximum light intensity value is greater than a threshold value;

if the maximum value of the first light intensity is larger than the threshold value, finding out a target posture of the deflection element with the maximum detected light intensity when the light gating device gates the output light beam of the target light guide unit based on the current posture of the deflection element, and taking the target light guide unit and the target posture as aiming state parameters of the mobile optical communication receiving system;

and if the maximum value of the first light intensity is not greater than the threshold value, controlling the deflection element to change the posture, and entering the step S1.

Optionally, finding the target posture of the deflecting element, which maximizes the detected light intensity when the light gating device gates the output light beam of the target light guiding unit, based on the current posture of the deflecting element, includes:

controlling the optical gating device to gate the output light beam of the target light guide unit, controlling the deflection element to change a preset number of postures according to a first mode, detecting and obtaining the light intensity of the output light beam gated by the optical gating device when the deflection element is in each posture, finding out the maximum light intensity value and obtaining the corresponding posture of the deflection element according to the light intensity information corresponding to each posture, and respectively representing the maximum light intensity value and the target posture.

A mobile optical communication receiving system aiming device, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the mobile optical communication receiving system aiming method as described above when executing the computer program.

A computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the mobile optical communication receiving system aiming method as described above.

According to the above technical solution, the mobile optical communication receiving system provided by the present invention includes a deflection element, a focusing element array, a light guiding unit array, an optical gating device and a communication device, wherein the deflection element is configured to obtain light from the outside and reflect the obtained light to the focusing element array, light guiding units of the light guiding unit array correspond to focusing elements of the focusing element array one to one, any focusing element of the focusing element array is configured to converge the light incident to the focusing element and emit the light to a corresponding light guiding unit of the light guiding unit array, any light guiding unit transmits the light incident to the light guiding unit to the optical gating device, the optical gating device is configured to gate an output light beam of any light guiding unit and emit the gated light beam to the communication device, and the communication device is configured to transmit the received light beam. The deflection element can rotate, light rays from the outside acquired by the deflection element can be reflected by the deflection element and then enter the focusing element by rotating the deflection element, the output light beam of the corresponding light guide unit is gated by the optical gating device, and the gated light beam enters the communication device, so that the capturing, aiming and tracking of the light beam are realized.

The aiming method and the aiming equipment for the mobile optical communication receiving system and the computer readable storage medium can realize that light rays from the outside are obtained by rotating the deflection element, the output light rays of each light guide unit of the light guide unit array are gated by controlling the light gating device, and light beams can be captured, aimed and tracked according to the detection result.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a mobile optical communication receiving system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a mobile optical communication receiving system according to another embodiment of the present invention;

FIG. 3 is a perspective view of an array of three groups of optical fibers of a light guide unit array of an embodiment of the present invention on a focusing element array;

FIG. 4-1 is a diagram of an optical path of light converging to the light-entering end of the light-guiding unit via the focusing element according to an embodiment of the present invention;

FIG. 4-2 is a schematic diagram illustrating the relative positions of the light spot and the light-entering end of the light-guiding unit when light is obliquely incident on the focusing element according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a beam combiner of a light guide unit according to an embodiment of the present invention;

fig. 6 is a flowchart of a mobile optical communication receiving system aiming method according to an embodiment of the present invention;

fig. 7 is a flowchart of a mobile optical communication receiving system aiming method according to another embodiment of the present invention.

Reference numerals in the drawings of the specification include:

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-light splitting device, 110-detection device, 111-control device and 112-optical fiber.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic diagram of a mobile optical communication receiving system according to an embodiment, as shown in the figure, the mobile optical communication receiving system includes a deflecting element 101, a focusing element array 102, a light guiding unit array 104, a light gating device 106 and a communication device 107, where the deflecting element 101 is configured to obtain light from the outside and reflect the obtained light to the focusing element array 102, and the deflecting element 101 is rotatable so that the light obtained by the deflecting element 101 can be reflected to the focusing element array 102;

the light guide units 105 of the light guide unit array 104 correspond to the focusing elements 103 of the focusing element array 102 one to one, any focusing element 103 of the focusing element array 102 is configured to converge light entering the focusing element 103 and then enter the corresponding light guide unit 105 of the light guide unit array 104, any light guide unit 105 is configured to transmit the light entering the light guide unit 105 to the optical gating device 106, the optical gating device 106 is configured to gate an output light beam of any light guide unit 105, so that the gated light beam enters the communication device 107, and the communication device 107 is configured to transmit the received light beam.

The deflecting element 101 receives light from the outside and reflects the light. The deflecting element 101 is rotatable, and the rotation of the deflecting element 101 enables the reflection direction of the light incident to the deflecting element 101 to be changed. By rotating the deflecting element 101, light received by the deflecting element 101 can be reflected by the deflecting element 101 and then can be incident on the focusing element array 102.

Any focusing element 103 of the focusing element array 102 converges light incident on the focusing element 103 and enters a corresponding light guiding unit 105 of the light guiding unit array 104, and any light guiding unit 105 transmits the light incident on the light guiding unit 105 to the light gating device 106.

The mobile optical communication receiving system of the embodiment can enable light rays which are obtained by the deflection element and come from the outside to be reflected by the deflection element and then enter the focusing element by rotating the deflection element, and enables the gated light beams to enter the communication device by gating the output light beams of the corresponding light guide units through the optical gating device, so that the capturing, aiming and tracking of the light beams are realized.

In this embodiment, the structure of the deflecting element 101 is not limited as long as it can receive light from the outside, reflect the light, and rotate to change the light reflection direction. The deflection element 101 may be, but is not limited to, a controllable deflection mirror, which may be an electrostatically driven deflection mirror, a piezo ceramic closed loop deflection mirror, or a two dimensional voice coil motor controlled deflection mirror.

Preferably, in some embodiments, the optical center of each focusing element 103 of the focusing element array 102 is located on a first predetermined surface, the first predetermined surface is a curved surface, and the position and the shape of the first predetermined surface are such that after the light obtained by the deflecting element 101 is reflected by the deflecting element 101, the reflected light can be vertically incident on the corresponding focusing element 103. The optical centers of the focusing elements 103 of the focusing element array 102 are all arranged on the same curved surface, and after the light rays obtained by the deflecting element 101 are reflected by the deflecting element 101, the reflected light rays of each part can vertically enter the corresponding focusing element 103, so that the system can effectively receive the light, the capturing efficiency of the system to the light beams is improved, and the aiming accuracy is improved.

The first predetermined surface may in particular be a concave surface with respect to the deflecting element 101. In particular, it may be that the optical center of the deflecting element 101 coincides with the center of curvature of said first predetermined surface, i.e. the first predetermined surface is a concave surface with respect to the deflecting element 101, on which the optical center of each focusing element 103 of the array of focusing elements 102 is located. Referring to fig. 2 for example, fig. 2 is a schematic diagram of a mobile optical communication receiving system according to another embodiment, and as shown in the figure, each focusing element 103 of the focusing element array 102 may be arranged in a concave surface. An inner arc type focusing element array is formed, so that the direction is adjusted by matching with the deflecting element 101, the vertical incidence of light rays is facilitated, and the incidence angle of the light rays on the deflecting element 101 can be adjusted within the field angle range. If the individual focusing elements 103 of the focusing element array 102 are arranged convex with respect to the deflecting element 101, i.e. the focusing element array 102 is an outer arc array, the outer arc array is passive receiving and cannot be adjusted with respect to the incident angle. The focusing elements 103 may be microlenses, and the corresponding focusing element array 102 is an inner arc type microlens array.

Further preferably, the optical center of the light-entering end of each light-guiding unit 105 of the light-guiding unit array 104 is located on a second preset surface, the second preset surface is a curved surface, and the position and the shape of the second preset surface meet the requirement that the light converged by the focusing element 103 is vertically incident to the light-entering end of the corresponding light-guiding unit 105. The optical centers of the light inlet ends of the light guide units 105 of the light guide unit array 104 are all located on the same curved surface, so that the light rays converged and emitted by the focusing element 103 are vertically incident to the light inlet ends of the corresponding light guide units 105, the system effectively receives the light, and the capturing efficiency of the system to the light beams and the aiming accuracy are improved. It may be that the radius of curvature of the second predetermined surface is the same as the radius of curvature of the first predetermined surface. Specifically, the second predetermined surface may be a concave surface with respect to the deflecting element 101, and the optical center of each light guiding unit 105 of the light guiding unit array 104 is located on the concave surface. As shown in fig. 2, the light-entering ends of the light guide units 105 of the light guide unit array 104 may be arranged in a concave shape.

In this embodiment, the structure of the light guide unit 105 is not limited as long as the light incident on the light guide unit 105 can be transmitted to the light gating device 106. In some embodiments, the light guiding unit 105 includes a plurality of optical fibers that form an optical fiber array. Preferably, the plurality of optical fibers may include a central optical fiber and an optical fiber surrounding the central optical fiber. Referring to fig. 3 by way of example, fig. 3 is a perspective view of three sets of optical fiber arrays of the light guiding unit array in the focusing element array according to an embodiment, as shown in the drawing, the focusing element array 102 includes a plurality of focusing elements 103, one set of optical fiber arrays corresponds to one focusing element 103, and each set of optical fiber arrays is formed by a plurality of optical fibers 112 as one light guiding unit 105. Each group of fiber arrays includes a central fiber and fibers surrounding the central fiber.

Since the optical fiber coupling is sensitive to the angle and the numerical aperture is relatively small, if the light guide unit 105 employs an optical fiber array, the focusing element 103 cannot improve the light coupling efficiency by using the focusing element 103 with a large aperture, the focusing element 103 may employ a micro lens, the effective aperture of the unit lens (i.e., focusing element) of the foregoing curved micro lens array may be designed according to the numerical aperture of the optical fiber, and the number of focusing elements of the focusing element array under a certain receiving aperture may be further calculated.

The design can be made to calculate the effective aperture and focal length of the focusing element 103 from the numerical aperture of the optical fiber 112. In the case where an incident light ray perpendicularly enters the focusing element 103 and an emergent light ray of the focusing element 103 perpendicularly enters the corresponding optical fiber array, the incident light ray can be approximately regarded as a paraxial light ray, and 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:

where F denotes the F-number of the focusing element 103, F denotes the focal length of the focusing element 103, D denotes the effective aperture of the focusing element 103, and NA denotes the numerical aperture of the optical fiber 112. For example, using a multimode fiber 50um/125um (id/od), the numerical aperture is about 0.22, and when setting the lens focal length to 5mm, the effective aperture size is about: 2.2mm, and the spacing between closely-spaced optical fibers of the optical fiber array is controlled to be about 150um, so that one lens corresponds to the array of multiple optical fibers, and the approximate distribution can be seen in fig. 3.

For each group of fiber arrays, a group of fiber arrays may include a plurality of fiber light entrance ends in a square array or a circular array, such as a 3 × 3 square array. In order to make the light incident vertically, the light-incoming ends of the respective groups of fiber arrays are arranged in a curved surface, specifically, a concave surface with respect to the deflecting element 101. In practical application, a high-precision optical fiber positioning hole plate can be manufactured to assemble and fix the optical fiber array. Specifically, a high-precision optical fiber positioning hole plate can be manufactured by using a photolithography technique, and one ends of all optical fibers are accurately positioned by the optical fiber positioning hole plate and closely arranged corresponding to a group of optical fibers of the same focusing element 103. The optical fiber may be single mode or multi-mode, for example, the outer diameter of the optical fiber is 125um, the distance between the optical fibers in a group of optical fiber arrays corresponding to the same focusing element 103 is 150um, the outermost layer of the optical fiber may be wrapped with a protective material, and the interface used for connecting the optical fiber may be a standard optical fiber interface such as FC/PC.

Preferably, in some embodiments, the distance between the light-entering end of the light-guiding unit 105 and the corresponding focusing element 103 is smaller than the focal length of the corresponding focusing element 103. In this embodiment, when the incident light is vertically incident on the focusing element 103, the center of the light spot formed at the light entrance end of the optical fiber array coincides with the center of the light entrance end of the optical fiber array, and in this case, the amount of light energy coupled into the light guide unit 105 is the largest, specifically, the energy coupled through the central optical fiber is added to the energy coupled through the edge optical fibers, so that the energy value is the largest. If the incident light is not vertically incident on the focusing element 103, that is, the incident angle of the incident light on the focusing element 103 is greater than 0 degree, which is oblique incidence, the light spot incident on the light entrance end of the optical fiber array does not completely cover the light entrance ends of all the optical fibers of the optical fiber array, and the light energy is collected by the optical fibers covered by the light spot.

Referring to fig. 4-1 and 4-2 for example, fig. 4-1 is a light path diagram of light converging to the light entrance end of the light guide unit through the focusing element in an embodiment, and fig. 4-2 is a schematic diagram of relative positions of a light spot and the light entrance end of the light guide unit when the light is obliquely incident to the focusing element in an embodiment. As shown in fig. 4-1, if the light-incoming end of the light-guiding unit 105 is located on the defocused surface of the focusing element 103, the light spot always remains completely covering the converging diffuse spot of the focusing element 103 when the light is normally incident. With reference to fig. 4-1 and 4-2, if the incident angle of the light is greater than 0 degree, the energy is collected by the optical fiber covered by the light spot, and within the energy detectable threshold, the link is kept clear, and the viewing angle is increased, and the specific maximum half-viewing angle received can be represented as follows:

/>

wherein, theta _max Representing the maximum half field of view, Δ, of reception _x Indicating the distance between the light-in end of the light-guiding unit 105 and the focal plane of the corresponding focusing element 103, i.e. the defocus of the light-in end of the light-guiding unit 105Where f denotes the focal length of the focusing element 103, D denotes the effective aperture of the focusing element 103, and R denotes the spot radius received at the focal plane of the focusing element 103 when a light ray is incident on the focusing element 103. In the design, the effective aperture and the focal length of the focusing element 103 may be determined according to the numerical aperture of the used optical fiber, and further, by setting the distance between the light-entering end of the light guide unit 105 and the focal plane of the corresponding focusing element 103, the mobile optical communication receiving system can reach the required maximum half field angle, so that the field angle of the mobile optical communication receiving system meets the application requirement.

The light guide unit 105 may further include a beam combiner including an optical exit channel formed by merging the optical exit ends of the plurality of parallel optical fibers. The light-emitting ends of the multiple parallel optical fibers of the light guide unit 105 are fused to form a same light-emitting channel, so that the light received by each optical fiber is emitted through the light-emitting channel to form an output light beam of the light guide unit 105. Referring to fig. 2, each light guiding unit 105 includes a beam combiner 108, and each light guiding unit 105 is connected to the light gating device 106 through the corresponding beam combiner 108. Referring to fig. 5 by way of example, fig. 5 is a schematic diagram of a beam combiner of a light guiding unit according to an embodiment, which is manufactured on the basis of a fused-tapered fiber bundle, and the fiber coating layer is removed, and then the fiber coating layer is arranged in a manner that the fiber coating layer is heated and fused at a high temperature, and the fiber bundle is simultaneously stretched in the opposite direction and fused into a fused-tapered fiber bundle.

In this embodiment, the structure of the light gating device 106 is not limited, and the light gating device 106 may be an optical switch, which may include a Micro-Electro-Mechanical System (MEMS), a prism, or a 1 × n optical switch of a Micro-nano mechanism. Preferably, the delay is small, the insertion loss is small, and more parallel ports can be obtained by cascading, so that the light beams input from the N ports can be effectively output from the output port. The communication device 107 may employ an optical module.

In some embodiments, the mobile optical communication receiving system further includes: a light splitting device, disposed on the light-emitting path of the light gating device 106, for splitting one path of the output light beam gated by the light gating device 106 into a light beam to be incident on the communication device 107, and splitting the other path of the light beam to be incident on the detection device; the detection device is used for detecting the light intensity of the received light beam; and the control device is respectively in communication connection with the deflection element 101, the light gating device 106 and the detection device, and is used for respectively controlling the deflection element 101 to rotate, controlling the light gating device 106 to gate the output light beam of any one light guide unit 105 and acquiring light intensity information detected by the detection device. Referring to fig. 2, the light splitting device 109 is disposed on the light outgoing path of the light gating device 106, the light splitting device 109 is connected to the communication device 107 and the detection device 110, respectively, and splits one beam of the output light beam gated by the light gating device 106 to be incident on the communication device 107 and splits the other beam of the output light beam to be incident on the detection device 110. The control means 111 are in communication with the deflection element 101, the light gating means 106 and the detection means 110, respectively.

In this embodiment, the type and structure of the light splitting device 109 or the detecting device 110 are not limited, and the light splitting device 109 may split light proportionally. The control device 111 may be, but is not limited to, a Micro Controller Unit (MCU).

In one embodiment, the emission source laser has a wavelength of 1550nm, is output after being collimated by using a single-mode optical fiber and a collimating lens, and has a beam waist diameter of 3.49mm, a divergence angle of 0.565mrad and a transmission distance of 3 m-5 m. The deflection element 101 is an electrostatically driven deflection mirror, for example, a mirror with a mirror diameter of 5mm, a gold-plated surface, a mechanical deflection angle of +, -5 °, an optical deflection angle of +/-10 °, and an electrostatically driven deflection mirror capable of being maintained at a specific angle. Other options can be a piezoceramic closed-loop deflection mirror, such as core tomorrow E70, which has the advantages of carrying a large-area mirror and having the disadvantage of smaller angle; or a deflection mirror controlled using a two-dimensional voice coil motor, has the advantage of providing a larger area mirror, e.g. up to 50.8mm or even more in diameter, and has the disadvantage of lower accuracy.

In addition, the simulation and the manufacture of the arc-shaped micro-lens array are as follows: the method can adopt the high-precision ultra-precision numerical control machine tool in the current manufacturing field, utilizes a natural single crystal diamond cutter, can realize the ultra-precision one-step forming processing of three-dimensional complex curved surfaces, has high precision and good stability, has the surface roughness of 3nm, can process materials such as aluminum, nickel, gold, germanium, zinc selenide, zinc sulfide, resin (such as PMMA), and the like, and has the processing capability of manufacturing various ultra-precision core key parts such as various plane reflectors, spherical reflectors, concave-convex aspheric reflectors, off-axis aspheric reflectors, aspheric array reflectors, fresnel reflectors, micro-groove arrays, polyhedral prisms and the like and optical glass mould pressing and injection moulds with various sizes. Therefore, the arc-shaped micro-lens array processing is feasible, and the application is valuable.

Manufacturing a curved surface optical fiber array: the existing manufacturing process has the manufacturing capability of a curved surface optical fiber array, and has the processing capability of the curved surface optical fiber array with submicron arrangement precision according to a unique design.

The optical fiber coupling technology comprises the following steps: the coupling of single mode fibers requires precise angular and positional alignment, and in practical applications, a 6-dimensional precision moving stage and two mirrors are often used to achieve 6 degrees of freedom adjustment,

the mobile optical communication receiving system of the embodiment can achieve the following beneficial effects: the structure is simple, the multi-purpose optical fiber optoelectronic device has high integration degree, and the integration and the miniaturization are convenient. And the micro-lens array can be manufactured by adopting a die-casting mode at the later stage, so that the cost can be greatly reduced. And c, the incident angle is convenient to adjust, and the optical fiber coupling and the optical fiber integration are facilitated. In addition, in the invention, the rotation of the reflector is utilized to achieve the angle adjustment in the X and Y directions, the center of the reflector is positioned at the center of the arc-shaped micro lens array, so that the vertical angle incidence is realized, the information judgment of the optical switch is utilized to obtain the incidence angle information, and the reflector is finely adjusted, so that the higher coupling efficiency is obtained.

Referring to fig. 6, fig. 6 is a flowchart of an aiming method for a mobile optical communication receiving system according to an embodiment, including the following steps:

s201: when the deflecting element 101 is in the current posture, the light gating device 106 is controlled to gate the output light beams of the light guide units 105 of the light guide unit array 104 in sequence, and when the light gating device 106 gates the output light beams of any one of the light guide units 105, the light intensity of the output light beams gated by the light gating device 106 is detected and obtained.

When the deflecting element 101 is in the current posture, the light gating device 106 is controlled to gate the output light beams of the respective light guiding units 105 of the light guiding unit array 104 in sequence, and for each light guiding unit 105, when the light gating device 106 gates the output light beam of the own light guiding unit 105, the light intensity of the output light beam gated by the light gating device 106 is detected and obtained.

S202: according to the light intensity information corresponding to each light guiding unit 105 of the light guiding unit array 104, the maximum light intensity value and the corresponding light guiding unit 105 are found and are respectively expressed as a first maximum light intensity value and a target light guiding unit.

S203: and judging whether the first maximum light intensity value is larger than a threshold value.

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

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

S204: finding out the target posture of the deflection element 101 with the maximum detected light intensity when the light gating device 106 gates the output light beam of the target light guiding unit based on the current posture of the deflection element 101, and taking the target light guiding unit and the target posture as the aiming state parameters of the mobile optical communication receiving system.

S205: the deflecting element 101 is controlled to change the attitude, and the process proceeds to step S201.

If the maximum value of the first light intensity is greater than the threshold value, which indicates that the obtained light intensity of the deflecting element 101 in the current posture meets the requirement, based on the current posture of the deflecting element 101, when the light gating device 106 gates the output light beam of the target light guiding unit, the posture of the deflecting element 101 with the maximum detected light intensity is found, and the posture is taken as the target posture of the polarizing element 101. And then the target light guide unit and the target posture are used as aiming state parameters of the mobile optical communication receiving system, so that the mobile optical communication receiving system receives light with the target posture and the target light guide unit.

If the maximum value of the first light intensity is not greater than the threshold value, which indicates that the obtained light intensity of the deflecting element 101 in the current posture cannot meet the requirement, the deflecting element 101 is controlled to change the posture, and after the posture of the deflecting element 101 is changed, the deflecting element 101 traverses each light guide unit 105 of the light guide unit array 104 again to detect the light intensity received by each light guide unit 105.

The aiming method of the mobile optical communication receiving system of the embodiment obtains light rays from the outside through rotating the deflection element, gates output light rays of each light guide unit of the light guide unit array through controlling the light gating device, and can capture, aim and track light beams according to detection results. The mobile optical communication receiving system of the embodiment has simple structure and high integration degree.

In this embodiment, specific values of the threshold are not limited, and in practical application, the setting may be performed according to a detection condition of the light by the mobile optical communication receiving system.

In the step S204, when finding out the output light beam of the target light guiding unit gated by the light gating device 106 based on the current posture of the deflecting element 101, the target posture of the deflecting element 101, which maximizes the detected light intensity, includes: controlling the optical gating device 106 to gate the output light beam of the target light guide unit, controlling the deflection element 101 to change a preset number of postures according to a first mode, detecting and obtaining the light intensity of the output light beam gated by the optical gating device 106 when the deflection element 101 is in each posture, and finding out the maximum light intensity value and obtaining the corresponding posture of the deflection element 101 according to the light intensity information corresponding to each posture, wherein the maximum light intensity value and the target posture are respectively represented as a second maximum light intensity value and the target posture.

Further referring to fig. 7, fig. 7 is a flowchart illustrating a mobile optical communication receiving system aiming method according to yet another embodiment, as shown in the drawing, step S204 includes the following steps:

s2041: controlling the optical gating device 106 to gate the output light beam of the target light guide unit, controlling the deflection element 101 to change the preset number of postures according to a first mode, and detecting and obtaining the light intensity of the output light beam gated by the optical gating device 106 when the deflection element 101 is in each posture.

S2042: and according to the light intensity information corresponding to each gesture. Finding the maximum light intensity value and obtaining the corresponding posture of the deflecting element 101 are respectively represented as a second maximum light intensity value and the target posture.

Controlling the optical gating device 106 to gate the output light beam of the target light guide unit, controlling the deflection element 101 to change the preset number of postures according to a first mode based on the current posture of the deflection element 101, and detecting and obtaining the light intensity of the output light beam gated by the optical gating device 106 when the deflection element 101 changes the posture once. For example, the preset number is M, and the deflecting element 101 has M traverse poses in the present process.

Controlling the deflecting element 101 to change the preset number of poses in the first manner comprises: in the changing of the attitude of the deflecting element 101 by the preset number of times, the deviation between the attitude after any one time of changing of the deflecting element 101 and the initial attitude is smaller than the preset deviation, and the initial attitude is the attitude of the deflecting element 101 before the deflecting element 101 is controlled to change the attitude by the preset number of times. The first way is to fine-tune the attitude of the deflecting element 101.

In some embodiments, controlling the deflecting element 101 to change the posture in step S205 may be controlling the deflecting element 101 to change the posture in the second manner, the controlling the deflecting element 101 to change the posture in the second manner including: the deviation of the posture of the deflecting element 101 after the change from the posture before the change is larger than a preset deviation. The second way is to coarsely adjust the attitude of the deflecting element 101.

The mobile optical communication receiving system aiming method of the embodiment obtains the position information by using the energy comparison of the detector, but not using the position detector for judging, the speed is higher, because the traditional combination of the CCD and the position sensor used for judging the position needs an integration process and needs image recognition, the position sensor is limited by the area and can generally only judge a tiny angle, and the energy used by the scheme only needs to judge whether the energy exceeds the judging threshold value of the detector, if the energy is lower than the threshold value, the posture is adjusted, and if the energy is higher than the threshold value, the stable transmission is realized, the judging time is greatly omitted in the process, so that the possibility of mobile communication is greatly improved.

The defocusing principle is used for increasing the angle of view, and in order to keep the link smooth, the energy transmission must be ensured not to be interrupted.

The present embodiment further provides a mobile optical communication receiving system aiming apparatus, including:

a memory for storing a computer program;

a processor for implementing the steps of the mobile optical communication receiving system aiming method as described in any of the above embodiments when executing the computer program.

The mobile optical communication receiving system aiming device of the embodiment obtains light rays from the outside through rotating the deflection element, gates output light rays of each light guide unit of the light guide unit array through controlling the light gating device, and can capture, aim and track light beams according to detection results. The mobile optical communication receiving system of the embodiment has simple structure and high integration degree.

The present embodiment also provides a computer-readable storage medium, having a computer program stored thereon, which when executed by a processor implements the steps of the mobile optical communication receiving system aiming method according to any of the above embodiments.

The computer readable storage medium of this embodiment, when the stored computer program is executed by the processor, can realize that the light beam from the outside can be obtained by rotating the deflection element, the output light of each light guide unit of the light guide unit array can be gated by controlling the light gating device, and the light beam can be captured, aimed and tracked according to the detection result. The mobile optical communication receiving system of the embodiment has simple structure and high integration degree.

The mobile optical communication receiving system, the pointing method and apparatus, and the storage medium according to the present invention have been described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A mobile optical communication receiving system is characterized by comprising a deflection element, a focusing element array, a light guide unit array, a light gating device and a communication device, wherein the deflection element is used for acquiring light rays from the outside and reflecting the acquired light rays to the focusing element array;

the light guide unit of the light guide unit array corresponds to the focusing elements of the focusing element array in a one-to-one manner, any focusing element of the focusing element array is used for converging light rays incident to the focusing element and then irradiating the light rays to the corresponding light guide unit in the light guide unit array, any light guide unit is used for transmitting the light rays incident to the light guide unit to the light gating device, the light gating device is used for gating output light beams of any light guide unit and enabling the gated light beams to be incident to the communication device, and the communication device is used for transmitting the received light beams.

2. The mobile optical communication receiving system according to claim 1, wherein each optical center of the focusing elements of the focusing element array is located on a first predetermined surface, the first predetermined surface being a concave surface with respect to the deflecting element.

3. The mobile optical communication receiving system according to claim 1 or 2, wherein an optical center of a light inlet end of each light guide unit of the light guide unit array is located on a second predetermined surface, the second predetermined surface is a curved surface, and a position and a shape of the second predetermined surface satisfy that light rays converged by the focusing element are vertically incident to the light inlet end of the corresponding light guide unit.

4. The mobile optical communication reception system according to claim 2, wherein an optical center of the deflecting element coincides with a center of curvature of the first preset surface.

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

6. The mobile optical communication reception system according to claim 1, wherein the light guide unit includes a plurality of optical fibers forming 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 an optical output channel formed by merging optical output ends of the plurality of parallel optical fibers.

8. The mobile optical communication reception system according to claim 1, further comprising:

9. A mobile optical communication reception system aiming method applied to the mobile optical communication reception system according to any one of claims 1 to 8, the method comprising:

10. The aiming method for mobile optical communication receiving system of claim 9, wherein finding out the target posture of the deflecting element that maximizes the detected light intensity when the optical gating device gates the output light beam of the target light guiding unit based on the current posture of the deflecting element comprises:

11. A mobile optical communications receiving system aiming device, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the mobile optical communications reception system aiming method according to any one of claims 9 to 10 when executing said computer program.

12. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps of the mobile optical communication reception system aiming method according to any one of claims 9 to 10.