Optical receiver, optical receiver, optical communication system and optical receiving method

Abstract

The invention relates to the technical field of optics, in particular to an optical receiver, an optical communication system and an optical receiving method. The optical receiver comprises an optical receiving surface and N1 first photoelectric detector (PD) arrays. The light receiving surface comprises N1 light receiving areas, and the N1 first PD arrays are arranged in the N1 light receiving areas respectively. The shape of any light receiving area is an axisymmetric curved-surface quadrangle, an axisymmetric curved-surface pentagon, an axisymmetric curved-surface hexagon, a spherical surface or an ellipsoid, or an axisymmetric quadrangle, an axisymmetric pentagon, an axisymmetric hexagon, or a distorted axisymmetric quadrangle or a distorted axisymmetric hexagon. N1 is a positive integer greater than or equal to 2. Each first PD array can be used for carrying out photoelectric conversion on received light energy and outputting a first electric parameter obtained through conversion. The optical receiver provided by the invention is large in communication bandwidth and relatively high in applicability and practicability.

Description

Optical receiver, optical receiver, optical communication system and optical receiving method Technical Field

[0001] The present application relates to the field of optical technology, and in particular to an optical receiver, an optical receiver, an optical communication system, and an optical receiving method. Background Art

[0002] With the continuous advancement of communication technology and the emergence of practical application needs, integrated sensing and communication (ISAC) systems have gradually been proposed. These systems primarily perceive the attributes and states of all services, networks, users, terminals, and environmental objects. Because ISAC systems require high-precision angular perception and high-speed communication, and because light offers superior sensing performance compared to traditional RF bands, optical wireless communication (OWC) technology has become a key technical support for ISAC systems.

[0003] In order to achieve a large field of view (FOV), high-precision angle of arrival (AOA) estimation, and a high fill ratio on the optical receiving side, the existing wireless optical communication system used in the integrated communication and perception system requires that the optical receiver it contains receive signal light through a high-resolution PD array composed of a large number of photoelectric detectors (PDs). However, the PD array used by the existing optical receiver contains too many PDs, which results in a small communication bandwidth of the optical receiver. The integrated communication and perception system requires a larger communication bandwidth, so the existing optical receiver is not suitable for the integrated communication and perception system based on the wireless optical communication system.

[0004] Summary of the Invention

[0005] To address the above-mentioned issues, the present application provides an optical receiver, an optical receiver, an optical communication system, and an optical reception method. The optical receiver has a large communication bandwidth, and the communication bandwidth of an optical receiver based on the optical receiver is also large, which is conducive to the application of the optical receiver in an integrated communication and perception system.

[0006] In a first aspect, the present application provides an optical receiver. The optical receiver includes a light receiving surface and N1 first photodetector PD arrays arranged on the light receiving surface. The light receiving surface includes N1 light receiving areas, and the N1 first PD arrays are respectively arranged in the N1 light receiving areas. Each first PD array in the N1 first PD arrays includes a plurality of connected PDs. The shape of any of the N1 light receiving areas is an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, an axisymmetric curved hexagon, a sphere or an ellipsoid, or the shape of any of the light receiving areas is an axisymmetric quadrilateral, an axisymmetric pentagon, an axisymmetric hexagon, or the shape of any of the light receiving areas is a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon. N1 is a positive integer greater than or equal to 2. Each of the N1 first PD arrays is used to perform photoelectric conversion on the received light energy through the multiple PDs included therein and output the first electrical parameter obtained by the conversion.

[0007] In the above implementation, the light receiving surface of the optical receiver is divided into multiple light receiving areas, and a corresponding first PD array is set on each light receiving area. At the same time, the shape of any of the multiple light receiving areas is set to an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, an axisymmetric curved hexagon, a sphere or an ellipsoid, or an axisymmetric quadrilateral, an axisymmetric pentagon, an axisymmetric hexagon, or a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon. In this way, the number of PDs included in the first PD array set on each light receiving area can be relatively uniform, so that the number of PDs included in each first PD array is relatively small, so that the light spot formed by the signal light on the light receiving surface 10 will only fall on a smaller number of first PD arrays. The communication bandwidth of the optical receiver is large. Using the optical receiver provided by this application in the optical receiver can effectively improve the communication bandwidth of the optical receiver, thereby improving the applicability and practicality of the optical receiver in the integrated communication and perception system.

[0008] In conjunction with the first aspect, in one feasible implementation, the light receiving surface is a continuous quadratic surface. Each of the N1 light receiving areas is shaped like an axisymmetric curved pentagon, and N1 is greater than or equal to 6. Alternatively, each of the N1 light receiving areas is shaped like an axisymmetric curved hexagon, and N1 is greater than or equal to 7.

[0009] In the above implementation, the light receiving surface is designed as a continuous quadratic surface structure, and the shape of each light receiving area is designed as an axisymmetric curved pentagon or axisymmetric curved hexagon. Designing the light receiving surface as a curved surface can reduce the impact of aberrations on the receiving performance of the light receiver. Furthermore, designing each light receiving area as an axisymmetric curved pentagon or axisymmetric curved hexagon not only increases the communication bandwidth of the light receiver but also facilitates the design and production of the light receiving surface.

[0010] In combination with the first aspect, in a feasible implementation, the light receiving surface is a continuous quadratic surface. The N1 light receiving areas are composed of M1 first light receiving areas and M2 second light receiving areas. The shape of each first light receiving area in the M1 first light receiving areas is an axisymmetric curved pentagon, and the shape of each second light receiving area in the M2 second light receiving areas is an axisymmetric curved hexagon. M1 is a positive integer greater than or equal to 1, and M2 is a positive integer greater than or equal to 5.

[0011] In the above implementation, the light receiving surface is designed as a continuous quadratic surface structure, consisting of a first light receiving region shaped like a curved pentagon and a second light receiving region shaped like a curved hexagon. This improves the communication bandwidth of the optical receiver while reducing the impact of aberrations on the receiver's reception performance. It also facilitates the design and production of the light receiving surface.

[0012] In combination with the first aspect, in a feasible implementation, the light receiving surface is a continuous quadratic surface. The N1 light receiving areas are composed of one third light receiving area and M3 fourth light receiving areas. The optical axis of the light receiving surface passes through the third light receiving area, and the shape of the third light receiving area is a spherical surface or an ellipsoidal surface. The shape of each of the M3 fourth light receiving areas is a curved quadrilateral. M3 is a positive integer greater than or equal to 2.

[0013] In the above implementation, the light receiving surface is designed as a continuous quadratic surface structure, and is composed of a third light receiving region shaped as a sphere or ellipsoid and M3 light receiving regions shaped as curved quadrilaterals. This improves the communication bandwidth of the light receiver while reducing the impact of aberrations on the receiver's reception performance. It also facilitates the design and production of the light receiving surface.

[0014] In combination with the first aspect, in a feasible implementation, M3 is greater than or equal to 5. The M3 fourth light receiving areas form at least two curved annular areas around the optical axis. Each of the at least two curved annular areas is composed of at least two fourth light receiving areas. The inner edge of one of the at least two curved annular areas is connected to the edge of the third light receiving area. In any two connected curved annular areas of the at least two curved annular areas, the number of fourth light receiving areas contained in the curved annular area close to the third light receiving area is less than the number of fourth light receiving areas contained in the curved annular area away from the third light receiving area.

[0015] In the above implementation, when the light receiving surface is composed of a third light receiving area having a spherical or ellipsoidal shape and M3 fourth light receiving areas having a curved quadrilateral shape, the M3 fourth light receiving areas having a curved quadrilateral shape are formed into at least two curved annular areas with the third light receiving area as the center. The centers of these curved annular areas are all on the optical axis of the light receiving surface, and the larger the curved annular area, the more fourth light receiving areas it contains. This structure can improve the communication bandwidth of the light receiver while reducing the impact of aberrations on the receiving performance of the light receiver, and can also facilitate the design and production of the light receiving surface.

[0016] In conjunction with the first aspect, in one feasible implementation, the light receiving surface is a spliced ​​curved surface and is formed by splicing N1 first planes. One of the N1 first planes is a light receiving area in the N1 light receiving regions, and the shape of any of the N1 light receiving areas is an axisymmetric quadrilateral, an axisymmetric pentagon, or an axisymmetric hexagon.

[0017] In the above implementation, the light receiving surface is designed as a structure of spliced ​​curved surfaces, and each spliced ​​surface is a light receiving area used to set up a first PD array. This approach not only improves the communication bandwidth of the optical receiver while avoiding the impact of aberration on the receiving performance of the optical receiver, but also further reduces the complexity of the design and production of the light receiving surface.

[0018] In conjunction with the first aspect, in one feasible implementation, the light receiving surface is a second plane, and the shape of each of the N1 light receiving areas is an axisymmetric quadrilateral. Alternatively, the shape of each of the N1 light receiving areas is an axisymmetric hexagon.

[0019] In the above implementation, the light receiving surface is designed as a plane composed of multiple light receiving areas with axisymmetric quadrilaterals or axisymmetric hexagons. On the one hand, it can improve the communication bandwidth of the light receiver, and on the other hand, it can also reduce the complexity of the design and production of the light receiving surface.

[0020] In combination with the first aspect, in a feasible implementation, the light receiving surface is a distorted plane. The shape of each of the N1 light receiving areas is a distorted axisymmetric quadrilateral, or each of the N1 light receiving areas is a distorted axisymmetric hexagon. The N1 light receiving areas are centrally symmetric about the optical axis of the light receiving surface. And the area difference between the light receiving area i in the N1 light receiving areas and the central light receiving area of ​​the N1 light receiving areas is smaller than the area difference between the light receiving area j in the N1 light receiving areas and the central light receiving area. Wherein, the central light receiving area is the light receiving area through which the optical axis of the light receiving surface passes, and the distance between the light receiving area i and the central light receiving area is smaller than the distance between the light receiving area j and the central light receiving area.

[0021] In combination with the first aspect, in a feasible implementation method, the distortion plane is obtained by distorting the third plane, the third plane includes N1 fifth light receiving areas, the shape of each of the N1 fifth light receiving areas is an axisymmetric hexagon or an axisymmetric quadrilateral, and one of the N1 light receiving areas is obtained by distorting one of the N1 fifth light receiving areas.

[0022] In combination with the first aspect, in a feasible implementation, the light receiving surface is obtained by subjecting the third plane to barrel distortion or pincushion distortion.

[0023] In conjunction with the first aspect, in one feasible implementation, each of the N1 light receiving areas includes N3 first sub-light receiving areas. The first PD array provided on each light receiving area includes N3 second PD arrays, with one second PD array provided within each first sub-light receiving area. N3 is a positive integer greater than or equal to 2.

[0024] In the above implementation, dividing the first PD array into multiple smaller second PD arrays can effectively ensure that the number of PDs included in the smallest PD array is small, thereby effectively improving the communication bandwidth of the optical receiver.

[0025] In combination with the first aspect, in a feasible implementation, N3 and The difference between them is less than or equal to the preset difference, where X is the total number of PDs included in the N1 first PD arrays.

[0026] In combination with the first aspect, in a feasible implementation, when the light receiving surface is a continuous quadratic surface, the shape of each of the N3 first sub-light receiving areas is an axisymmetric curved quadrilateral or an axisymmetric curved hexagon. Alternatively, when the light receiving surface is a spliced ​​curved surface or a second plane, the shape of each of the N3 first sub-light receiving areas is an axisymmetric quadrilateral or an axisymmetric hexagon. Alternatively, when the light receiving surface is a distorted plane, the shape of each of the N3 first sub-light receiving areas is a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon.

[0027] In combination with the first aspect, in a feasible implementation, the N3 second PD arrays contained in each first PD array are used to convert the received light energy into N3 second electrical parameters and output them, and the first electrical parameter output by each first PD array is composed of the N3 second electrical parameters output by the N3 second PD arrays contained in each first PD array.

[0028] In combination with the first aspect, in a feasible implementation, each light receiving area further includes N4 second sub-light receiving areas, and the sum of the areas of the N3 first sub-light receiving areas and the N4 second sub-light receiving areas contained in each light receiving area is equal to the area of ​​each light receiving area. A partial edge of each second sub-light receiving area in the N4 second sub-light receiving areas is connected to a partial edge of each light receiving area. The shape of each second sub-light receiving area is irregular and different from the shape of each first sub-light receiving area. N4 third PD arrays are arranged on the N4 second sub-light receiving areas. N4 is a positive integer greater than or equal to 1 and less than N3.

[0029] In combination with the first aspect, in a feasible implementation, the N3 second PD arrays included in each first PD array are used to convert the received light energy into N3 second electrical parameters and output them. The N4 third PD arrays included in each first PD array are used to convert the received light energy into N4 third electrical parameters and output them. The first electrical parameter output by each first PD array is composed of the N3 second electrical parameters output by the N3 second PD arrays included in each first PD array and the N4 third electrical parameters output by the N4 third PD arrays included in each first PD array.

[0030] In combination with the first aspect, in a feasible implementation, any one of the N1 first PD arrays includes N5 first PD networks. All PDs in each of the N5 first PD networks are connected in series to form a zigzag zigzag line structure. The extension direction of the zigzag zigzag line structure formed by each first PD network is fixed and parallel to a symmetry axis of the light receiving area where any one of the first PD arrays is located. The number of PDs included in each first PD network is equal to or greater than a first threshold. N5 is a positive integer greater than or equal to 2.

[0031] In the above implementation, the first PD array is formed by multiple independent first PD networks, and each first PD network adopts a zigzag zigzag line structure, which can effectively shorten the delay in the circuit, thereby further improving the communication bandwidth of the optical receiver 100.

[0032] In combination with the first aspect, in a feasible implementation method, any three adjacent PDs in the zigzag zigzag line structure formed by each first PD network are arranged according to an isosceles triangle, or any four adjacent PDs in the zigzag zigzag line structure formed by each first PD network are arranged according to a rectangle.

[0033] In combination with the first aspect, in a feasible implementation, the N5 first PD networks included in any one of the N1 first PD arrays are used to convert the received light energy into N5 fifth electrical parameters and output them, and the first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays.

[0034] In combination with the first aspect, in a feasible implementation, any one of the first PD arrays further includes N6 second PD networks. There is at least one first PD network between each of the N6 second PD networks and the center point of the light receiving area where any one of the first PD arrays is located. The number of PDs contained in each of the N6 second PD networks is greater than the first threshold value, and all the PDs contained in each of the second PD networks are connected in series to form a zigzag line structure with an unfixed extension direction. Some of the PDs contained in each of the second PD networks are connected in series to form a zigzag line structure, and the extension direction of the zigzag line structure formed is parallel to a symmetry axis of the light receiving area where any one of the first PD arrays is located. N6 is a positive integer greater than or equal to 1 and less than N5.

[0035] In the above implementation, some PDs in the first PD array that are located at the edge of the light receiving area and cannot form an integer number of first PD networks are connected in series to form a special second PD network. This allows the first PD array to be composed of multiple identical or different PD networks, thereby ensuring the receiving performance of the optical receiver 100.

[0036] In conjunction with the first aspect, in one feasible implementation, the N5 first PD networks included in any one of the N1 first PD arrays are configured to convert received light energy into N5 fifth electrical parameters and output them. The N6 second PD networks included in any one of the first PDs are configured to convert received light energy into N6 sixth electrical parameters and output them. The first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays and the N6 sixth electrical parameters output by the N6 second PD networks included in any one of the first PD arrays.

[0037] In conjunction with the first aspect, in one feasible implementation, any one of the first PD arrays further includes N7 third PD networks. At least one first PD network exists between each of the N7 third PD networks and the center point of the light receiving area where the any one of the first PD arrays is located. The number of PDs included in each of the N7 third PD networks is greater than the first threshold, and all PDs included in each third PD network are connected in series to form a zigzag line structure with a non-fixed extension direction. N7 is a positive integer greater than or equal to 1 and less than N5.

[0038] In the above implementation, some PDs in the first PD array that are located at the edge of the light receiving area and cannot form an integer number of first PD networks are connected in series to form a special third PD network. This also enables the first PD array to be composed of multiple identical or different PD networks, thereby ensuring the receiving performance of the optical receiver 100.

[0039] In conjunction with the first aspect, in one feasible implementation, the N5 first PD networks included in any one of the N1 first PDs are configured to convert received light energy into N5 fifth electrical parameters. The N7 third PD networks included in any one of the first PD arrays are configured to convert received light energy into N7 seventh electrical parameters. The first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays and the N7 seventh electrical parameters output by the N7 third PD networks included in any one of the first PD arrays.

[0040] In combination with the first aspect, in a feasible implementation, the optical receiver further includes an output control module, which is connected to each of the N1 first PD arrays. When the first signal light is incident on the optical receiver, the output control module is used to amplify the first electrical parameter output by each of the N1 first PD arrays to obtain N1 eighth electrical parameters. The output control module is also used to determine N2 target first PD arrays from the N1 first PD arrays based on the N1 eighth electrical parameters, and output the eighth electrical parameter corresponding to each of the N2 target first PD arrays.

[0041] In a second aspect, the present application provides an optical receiver, which includes a signal processing module and an optical receiver provided in the first aspect or any possible implementation of the first aspect. The signal processing module is connected to the optical receiver. The optical receiver is used to receive a first signal light through N2 target first PD arrays in the N1 first PD arrays, and output N2 eighth electrical parameters. Wherein, N2 is a positive integer greater than or equal to 1 and less than N1. The signal processing module is used to process the N2 eighth electrical parameters to obtain the data to be transmitted carried by the first signal light.

[0042] In conjunction with the second aspect, in one feasible implementation, the signal processing module includes an analog-to-digital converter and a digital signal processor. The analog-to-digital converter is configured to perform analog-to-digital conversion on the N2 eighth electrical parameters to obtain N2 digital signals. The digital signal processor is configured to process the N2 digital signals to obtain the data to be transmitted.

[0043] In a third aspect, the present application provides an optical communication system, which includes an optical transmitter and an optical receiver provided in the aforementioned second aspect or any possible implementation of the second aspect.

[0044] In a fourth aspect, the present application provides a light receiving method, which is applicable to the optical receiver provided by the aforementioned second aspect or any possible implementation of the second aspect. When the first signal light reaches the light receiving surface, the optical receiver obtains N2 eighth electrical parameters output by N2 target first PD arrays in the N1 first PD arrays on the optical receiver, where N2 is a positive integer greater than or equal to 1 and less than N1. The optical receiver processes the N2 eighth electrical parameters through the signal processing module to obtain the data to be transmitted carried by the first signal light.

[0045] In conjunction with the fourth aspect, in one feasible implementation, the optical receiver may sequentially obtain, through the optical receiver, the eighth electrical parameter output by each of the N1 first PD arrays. When it is determined that the value of the eighth electrical parameter output by any first PD array among the N1 first PD arrays is equal to or greater than a preset electrical parameter value, the any first PD array and the N2-1 first PD arrays surrounding the any first PD array are determined as the N2 target first PD arrays.

[0046] The solutions provided in the second to fourth aspects are used to implement or cooperate with the optical receiver provided in the first aspect, and thus can achieve the same or corresponding beneficial effects as the first aspect, and will not be described in detail here.

[0047] In summary, the optical receiver provided in the embodiments of the present application can improve the communication bandwidth of the optical receiver, thereby improving the applicability and practicality of the optical receiver in the integrated communication and perception system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a schematic structural diagram of an optical receiver provided by the present application;

[0049] FIG2 is a schematic structural diagram of a light receiving area provided by the present application;

[0050] FIG3 is another structural diagram of an optical receiver provided by the present application;

[0051] FIG4 is another structural diagram of an optical receiver provided by the present application;

[0052] FIG5 is a schematic structural diagram of a light receiving surface provided by the present application;

[0053] FIG6 is another structural schematic diagram of a light receiving surface provided by the present application;

[0054] FIG7 is another structural schematic diagram of a light receiving surface provided by the present application;

[0055] FIG8 is another structural schematic diagram of a light receiving surface provided by the present application;

[0056] FIG9 is another structural schematic diagram of a light receiving surface provided by the present application;

[0057] FIG10 is another structural schematic diagram of a light receiving surface provided by the present application;

[0058] FIG11 is another structural schematic diagram of a light receiving surface provided by the present application;

[0059] FIG12 is another structural schematic diagram of a light receiving surface provided by the present application;

[0060] FIG13 is a schematic diagram of a generation of a light receiving surface provided by the present application;

[0061] FIG14 is another schematic diagram of generating a light receiving surface provided by the present application;

[0062] FIG15 is another structural schematic diagram of the light receiving area provided by the present application;

[0063] FIG16 is another structural schematic diagram of the light receiving area provided by the present application;

[0064] FIG17 is another structural schematic diagram of the light receiving area provided by the present application;

[0065] FIG18 is a schematic diagram of a zigzag zigzag line structure provided by the present application;

[0066] FIG19 is another structural schematic diagram of the light receiving area provided by the present application;

[0067] FIG20 is a schematic structural diagram of an optical receiver provided by the present application;

[0068] FIG21 is another structural diagram of an optical receiver provided by the present application;

[0069] FIG22 is a schematic structural diagram of an optical communication system provided by the present application;

[0070] FIG23 is a flow chart of a light receiving method provided in the present application. DETAILED DESCRIPTION

[0071] In order to facilitate the understanding and description of the embodiments of the present application, several concepts involved in the embodiments of the present application are first explained and illustrated below.

[0072] 1. PD array

[0073] The PD array involved in the embodiment of the present application refers to an aggregate composed of multiple PDs connected together. In actual implementation, the individual PDs contained in the PD array can be connected in series or in parallel. It should be understood that, under normal circumstances, when all the PDs in the PD array are connected in series, the electrical signal converted by the PD array after receiving light energy is a voltage signal, and this voltage signal is obtained by superimposing the voltage signals output by all the PDs in the PD array. When all the PDs in the PD array are connected in parallel, the electrical signal converted by the PD array after receiving light energy is a current signal, and this current signal is obtained by superimposing the current signals output by all the PDs in the PD array. It should be noted that the PD array involved in the embodiment of the present application does not need to distinguish the connection method between the PDs it contains, so the electrical signal output by the PD array involved in the embodiment of the present application can be either a voltage signal or a current signal, which is specifically determined by the actual application or design requirements of the PD array provided by the present application, and the present application does not impose specific restrictions on this.

[0074] 2. Surface polygons

[0075] The curved polygons (such as curved quadrilaterals, curved pentagons, or curved hexagons) involved in the embodiments of the present application primarily refer to closed areas on a curved surface formed by connecting multiple curved edges end to end. For the curved polygons provided in the present application, each of its curved edges connects two vertices of the curved polygon. Preferably, each curved edge of the curved polygon provided in the present application is the shortest curve connecting two vertices on the curved surface where the curved polygon is located.

[0076] 3. Optical axis of the light receiving surface

[0077] The light receiving surface referred to in the embodiments of this application refers to the surface of a light receiver in an optical receiver. The optical receiver referred to in this application is generally an optical system with rotational symmetry, and the optical axis of the light receiving surface is the center of rotation of the light receiver, which coincides with the rotational symmetry axis of the light receiver. If the light receiver is rotated along the optical axis of the light receiving surface by an angle less than 360 degrees, the rotated light receiver will completely overlap with the light receiver before rotation.

[0078] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the contents described above and the drawings provided in the embodiments of the present application.

[0079] In existing wireless optical communication systems used in integrated communication and perception systems, optical receivers receive signal light using a high-resolution PD array composed of a large number of PDs. However, the large number of PDs in the PD array results in a limited communication bandwidth for the optical receiver. Integrated communication and perception systems require a large communication bandwidth, making existing optical receivers unsuitable for wireless optical communication systems.

[0080] Based on this, the technical problem to be solved by this application is: how to increase the communication bandwidth of the optical receiver, thereby improving its applicability and practicality.

[0081] Please refer to Figure 1, which is a structural schematic diagram of an optical receiver provided by the present application. Among them, (a) in Figure 1 is a front view of the optical receiver 100 provided by the present application, and (b) in Figure 1 is a top view of the optical receiver 100 from the incident direction of the signal light. As shown in (a) and (b) in Figure 1, the optical receiver 100 mainly includes a light receiving surface 10 and N1 first PD arrays arranged on the light receiving surface 10. Among them, N1 is a positive integer greater than or equal to 2. Each of the above-mentioned N1 first PD arrays is composed of multiple PDs, and the multiple PDs in each first PD array can be connected in parallel or in series. The above-mentioned light receiving surface 10 includes N1 light receiving areas. In other words, the light receiving surface 10 is spliced ​​together by N1 independent light receiving areas, and each light receiving area is a part of the light receiving surface 10. The above-mentioned N1 first PD arrays are respectively arranged in the above-mentioned N1 light receiving areas, and a unique first PD array is arranged on each light receiving area. It should be understood that the so-called each first PD array is set in a light receiving area, which can be understood as each first PD array is embedded in a light receiving area, or all PDs contained in each first PD array are evenly distributed or densely spread in a light receiving area. In actual implementation, all PDs contained in each first PD array should be distributed as evenly as possible in the light receiving area where each first PD array is located, and try to avoid the existence of a large blank area without PD distribution in a certain light receiving area. Please refer to Figure 2, which is a structural schematic diagram of a light receiving area provided by the present application. As shown in Figure 2, taking the light receiving area 101 among the N1 light receiving areas as an example, a first PD array 102 is provided thereon, and the first PD array 102 includes a plurality of PDs, and these plurality of PDs are connected in series.

[0082] It should be noted that the light receiving area involved in this application refers to a partial surface of the light receiving surface 10, which can also be called a sub-light receiving surface, a partial light receiving surface, etc. Figure 1 (a) or (b) only schematically illustrates multiple light receiving areas in the above-mentioned N1 light receiving areas, and also only schematically illustrates the PDs contained in each first PD array. In actual implementation, the number of light receiving areas (which can also be understood as the number of first PD arrays) N1 and the number of PDs contained in each first PD array can be determined by the actual application requirements of the optical receiver 100, and this application does not impose specific restrictions on this. It should also be noted that the light receiving surface 10 presented in (a) or (b) in Figure 1 is a spherical surface, which is only exemplary. The embodiment of the present application does not impose specific restrictions on the shape of the light receiving surface 10. It can be a spherical surface as shown in Figure 1, or other quadratic surfaces such as an ellipsoid, or a non-quadratic surface, a plane, a distorted plane, etc.

[0083] In actual operation, each of the N1 first PD arrays can be used to perform photoelectric conversion on the light energy received by the multiple PDs contained in each first PD array, and output the first electrical parameter obtained by the conversion. It should be understood that the so-called electrical parameter in the embodiment of the present application can be a voltage signal or a current signal, which is specifically determined by the connection relationship between the multiple PDs in each first PD array, and the present application does not impose specific restrictions on this. It should also be noted here that since the signal light reaching the light receiving surface 10 is generally collimated and focused, the light spot formed by the signal light on the light receiving surface 10 generally only falls on part of the light receiving areas in the N1 light receiving areas. Therefore, when the signal light is actually received, only part of the first PD arrays in the N1 first PD arrays will receive light energy. That is to say, at a certain moment after the signal light reaches the light receiving surface 10, only part of the first PD arrays in the N1 first PD arrays will output a first electrical parameter that is not equal to zero, and the first electrical parameter output by the other first PD arrays that cannot receive light energy is zero.

[0084] In the above implementation, the light receiving surface 10 of the optical receiver 100 is divided into a plurality of light receiving areas, and a corresponding first PD array is set on each light receiving area. At the same time, the shape of any of the above-mentioned multiple light receiving areas is set to an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, an axisymmetric curved hexagon, a sphere or an ellipsoid, or an axisymmetric quadrilateral, an axisymmetric pentagon, an axisymmetric hexagon, or a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon. In this way, the number of PDs included in the first PD array set on each light receiving area can be relatively uniform, so that the number of PDs included in each first PD array is relatively small, so that the light spot formed by the signal light on the light receiving surface 10 will only fall on a smaller number of first PD arrays. The optical receiver 100 provided in the present application has a large communication bandwidth. Using the optical receiver 100 in an optical receiver can effectively improve the communication bandwidth of the optical receiver, thereby improving the applicability and practicality of the optical receiver in the integrated communication and perception system.

[0085] In some feasible implementations, please refer to FIG. 3 , which is another schematic diagram of the structure of an optical receiver provided in this application. As shown in FIG. 3 , the optical receiver 100 may further include an output control module 20. The output control module 20 is connected to each of the N1 first PD arrays. Specifically, the output control module 20 is connected to the electrical interface for outputting the first electrical parameter of each of the N1 first PD arrays.

[0086] In actual operation, when the first signal light enters the optical receiver 100, the output control module 20 may be configured to amplify the first electrical parameter output by each of the N1 first PD arrays to obtain N1 amplified first electrical parameters (hereinafter referred to as the eighth electrical parameter for ease of explanation). The output control module 20 may also be configured to determine N2 target first PD arrays from the N1 first PD arrays based on the N1 eighth electrical parameters and output the eighth electrical parameter corresponding to each of the N2 target first PD arrays.

[0087] Further, please refer to Figure 4, which is another structural schematic diagram of the optical receiver provided by the present application. As shown in Figure 4, the output control module 20 may include N1 first amplifiers (including first amplifier 1 to first amplifier N1), N1 first controllable switch devices (including first controllable switch device 1 to first controllable switch device N1) and a controller 201. Among them, the above-mentioned N1 first PD arrays are respectively connected to the N1 first amplifiers, and the N1 first amplifiers are also respectively connected to the N1 first controllable switch devices. The N1 first controllable switch devices are respectively connected to the N1 electrical interfaces (including electrical interface 1 to electrical interface N1) of the optical receiver 100, and the controller 201 is respectively connected to these N1 first controllable switch devices.

[0088] In actual operation, when the first signal light is incident on the optical receiver 100, the above-mentioned N1 first PD arrays will output N1 first electrical parameters to the above-mentioned N1 first amplifiers respectively. It should be understood that the value of the first electrical parameter output by the first PD array that can receive light energy will be greater than zero, while the value of the first electrical parameter output by the first PD array that cannot receive light energy is equal to zero. The above-mentioned N1 first amplifiers will respectively amplify the first electrical parameters they receive to obtain N1 eighth electrical parameters, and send the above-mentioned N1 eighth electrical parameters to the above-mentioned N1 first controllable switch devices respectively. At the same time, the controller 201 can turn on the above-mentioned N1 first controllable switch devices in sequence according to a preset order. It is assumed here that the turn-on order of the N1 first controllable switch devices is from the first controllable switch device 1 to the first controllable switch device N1. After turning on any first controllable switch device, the controller 201 obtains the eighth electrical parameter output by any first controllable switch device (for the sake of distinction, the eighth electrical parameter z is used here instead) and further determines whether the value of the eighth electrical parameter Z is equal to or greater than the preset electrical parameter value. If the controller 201 determines that the value of the eighth electrical parameter Z is equal to or greater than the preset electrical parameter value, it can determine the first PD array corresponding to the eighth electrical parameter, and then determine the first PD array and the N2-1 first PD arrays within a preset range around the first PD array as N2 target first PD arrays. In other words, the controller 201 can determine that the light spot formed by the first signal light mainly falls on these N2 target first PD arrays. Then, the controller 201 may turn on the N2 first controllable switch devices connected to the N2 target first PD arrays and turn off the N3-N2 first controllable switch devices other than the N2 first controllable switch devices, thereby causing the N2 electrical interfaces connected to the N2 first controllable switch devices to output N2 eighth electrical parameters corresponding to the N2 target first PD arrays. If the controller 201 determines that the value of the eighth electrical parameter Z is less than the preset electrical parameter value, it may turn on the next first controllable switch device and repeat the above determination and other operations until N2 target first PD arrays are determined and N2 eighth electrical parameters are output.

[0089] In some feasible implementations, the light receiving surface 10 may be a continuous non-quadratic surface. In this case, the shape of any of the N1 light receiving areas may be an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, or an axisymmetric curved hexagon. In other words, the multiple PDs contained in any of the N1 first PD arrays are arranged in the corresponding light receiving area according to an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, or an axisymmetric curved hexagon. It should be understood that in actual implementation, the shape of each of the N1 light receiving areas may be an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, or an axisymmetric curved hexagon. Alternatively, the shape of some of the N1 light receiving areas is an axisymmetric curved quadrilateral, and the shape of another part of the light receiving areas is an axisymmetric curved pentagon. Alternatively, the shape of some of the N1 light receiving areas is an axisymmetric curved quadrilateral, and the shape of another part of the light receiving areas is an axisymmetric curved hexagon. Alternatively, the shape of some of the N1 light receiving areas is an axisymmetric curved pentagon, and the shape of another part of the light receiving areas is an axisymmetric curved hexagon. Alternatively, the shape of some of the N1 light receiving areas is an axisymmetric curved quadrilateral, the shape of some of the light receiving areas is an axisymmetric curved pentagon, and the shape of the remaining part of the light receiving areas is an axisymmetric hexagon. The specific implementation form can be determined by the size and shape of the light receiving surface 10, and this application does not impose any specific restrictions on this.

[0090] In the above implementation, the light receiving surface 10 is designed to be a continuous non-quadratic surface structure, and the shape of each light receiving area is designed to be an axisymmetric curved quadrilateral, an axisymmetric curved pentagon or an axisymmetric curved hexagon. In this way, on the one hand, the influence of aberrations on the receiving performance of the light receiver 100 can be reduced through the curved surface design. On the other hand, the communication bandwidth of the light receiver 100 can be improved by designing the shape of each light receiving area, thereby improving its applicability.

[0091] In some feasible implementations, the light receiving surface 10 may be a continuous quadratic surface, such as a non-closed sphere or a non-closed ellipsoid. In this case, the shape of each of the N1 light receiving areas may be an axisymmetric curved pentagon, and N1 is greater than or equal to 6. That is, the light receiving surface 10 includes at least 6 light receiving areas in the shape of axisymmetric curved pentagons. Among these at least 6 light receiving areas, there is at least one specific light receiving area, each of whose curved edges will be connected to the curved edge of another light receiving area. The multiple PDs contained in each of the N1 first PD arrays are arranged in the corresponding light receiving area according to the axisymmetric curved pentagon.

[0092] Alternatively, in this case, the shape of each of the N1 light receiving areas can be an axisymmetric curved hexagon, and N1 is greater than or equal to 7. That is, the light receiving surface 10 includes at least 7 light receiving areas with an axisymmetric curved hexagonal shape. Among these at least 7 light receiving areas, there is at least one specific light receiving area, each of whose curved edges will be connected to the curved edge of another light receiving area. The multiple PDs contained in each of the N1 first PD arrays are arranged in the corresponding light receiving area according to the axisymmetric curved hexagon.

[0093] In the above implementation, the light receiving surface 10 is designed as a continuous quadratic surface structure, and the shape of each light receiving area is designed as an axisymmetric curved pentagon or an axisymmetric curved hexagon. Designing the light receiving surface 10 as a curved surface can reduce the impact of aberrations on the receiving performance of the light receiver 100. At the same time, designing the shape of each light receiving area as an axisymmetric curved pentagon or an axisymmetric curved hexagon not only improves the communication bandwidth of the light receiver 100, but also facilitates the design and production of the light receiving surface 10.

[0094] In some feasible implementations, the light receiving surface 10 may be a continuous quadratic surface. In this case, the N1 light receiving areas may be composed of M1 first light receiving areas and M2 second light receiving areas. M1 is a positive integer greater than or equal to 1. M2 is a positive integer equal to or greater than 5. The shape of each of the M1 first light receiving areas is an axisymmetric curved pentagon. Each of the M2 second light receiving areas is an axisymmetric curved hexagon. That is to say, among the N1 first PD arrays, the multiple PDs contained in the M1 first PD arrays are arranged according to the axisymmetric curved pentagon in the corresponding light receiving areas, and the multiple PDs contained in the remaining M2 first PD arrays are arranged according to the axisymmetric curved hexagon in the corresponding light receiving areas. For example, please refer to Figure 5, which is a structural schematic diagram of the light receiving surface provided in the present application. It should be understood that FIG5 shows a top view of the light receiving surface 10 in the direction of incidence of the signal light, and does not show the first PD array contained in each light receiving area. As shown in FIG5 , the light receiving surface 10 is a non-closed spherical surface, which is composed of a first light receiving area with an axisymmetric curved pentagon shape and a plurality of second light receiving areas with an axisymmetric curved hexagon shape. It should be understood that FIG5 is only an example. In actual implementation, the number of first light receiving areas only needs to be greater than 1, and the number of second light receiving areas only needs to be greater than 5. The values ​​of the number of first light receiving areas and second light receiving areas can be determined by the application requirements of the light receiving surface 10, and this application does not impose specific restrictions on this.

[0095] In the above implementation, the light receiving surface 10 is designed as a continuous quadratic surface structure, and the light receiving surface 10 is composed of a first light receiving region in the shape of a curved pentagon and a second light receiving region in the shape of a curved hexagon. This can improve the communication bandwidth of the optical receiver 100 while reducing the impact of aberrations on the receiving performance of the optical receiver 100, and also facilitate the design and production of the light receiving surface 10.

[0096] Optionally, in actual implementation, the five curved sides of each of the above-mentioned M1 first light receiving areas can be connected to the edges of the five second light receiving areas respectively, so as to ensure that the overall shape of the light receiving surface 10 is relatively regular, which can facilitate the design and production of the light receiving surface 10.

[0097] It should be supplemented that, in the case where the light receiving surface 10 is a non-closed spherical surface, in the specific design process, a closed spherical surface of a preset size can be processed by an inscribed polyhedron generation algorithm to obtain the inscribed polyhedron corresponding to the closed spherical surface. Then, the multiple vertices corresponding to the inscribed polyhedron can be determined, and some vertices can be selected from these multiple vertices. Then, the spherical surface where the selected vertices are located can be used as the light receiving surface 10, and these vertices can be determined as the vertices of the above-mentioned N1 light receiving areas. Then, the various curved pentagons enclosed by these vertices can be used as the above-mentioned M1 first light receiving areas, and the various curved hexagons enclosed by these vertices can be used as the above-mentioned M2 second light receiving areas, thereby completing the structural design of the light receiving surface 10.

[0098] For example, the inscribed polyhedron of a closed sphere can be constructed by the Goldberg–Coxeter construction method. Here, assuming that the constructed Goldberg polyhedron has 2n vertices, the Goldberg polyhedron may include 12 surfaces in the shape of curved pentagons and n-10 surfaces in the shape of curved hexagons. Wherein, n is a positive integer greater than or equal to 10. Then, the above-mentioned M1 first light receiving areas and M2 second light receiving areas can be selected from the above-mentioned 12 surfaces in the shape of curved pentagons and the n-10 surfaces in the shape of curved hexagons, thereby forming the light receiving surface 10. It should be understood that this is only an exemplary illustration of an optional design process of the light receiving surface 10. In actual implementation, other methods can also be used to complete the structural design of the light receiving surface 10, and this application does not impose specific restrictions on this.

[0099] In some feasible implementations, the light receiving surface 10 is a continuous quadratic surface. In this case, the N1 light receiving areas can be composed of 1 third light receiving area and M3 fourth light receiving areas. Wherein, M3 is a positive integer greater than or equal to 2. The optical axis of the light receiving surface 10 passes through the third light receiving area, and the shape of the third light receiving area is a sphere or an ellipsoid. The shape of each of the M3 fourth light receiving areas is a curved quadrilateral. That is to say, the multiple PDs contained in one of the N1 first PD arrays are arranged according to a spherical or ellipsoidal surface in the third light receiving area, and the multiple PDs contained in the remaining M3 first PD arrays are arranged according to an axisymmetric curved quadrilateral in the corresponding light receiving areas.

[0100] For example, please refer to Figure 6, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 6 takes the light receiving surface 10 as a spherical surface as an example, (a) in Figure 6 is a side view of the light receiving surface 10, and (b) in Figure 6 is a top view of the light receiving surface 10, and the first PD array contained in each light receiving area is not shown. As shown in Figure 6, the light receiving surface 10 can be composed of a third light receiving area in the shape of a spherical surface and a plurality of fourth light receiving areas in the shape of a curved quadrilateral. Normally, the above-mentioned M3 fourth light receiving areas should surround the third light receiving area. It should be understood that Figure 6 is only an example, which only schematically illustrates multiple fourth light receiving areas. In actual implementation, the number of fourth light receiving areas can be determined by the application requirements of the light receiving surface 10, and this application does not impose specific restrictions on this.

[0101] In the above implementation, the light receiving surface 10 is designed as a continuous quadratic surface structure, and is composed of a third light receiving region shaped as a sphere or ellipsoid and M3 light receiving regions shaped as curved quadrilaterals. This improves the communication bandwidth of the light receiver 100 while reducing the impact of aberrations on the receiving performance of the light receiver 100. It also facilitates the design and production of the light receiving surface 10.

[0102] Furthermore, in the case where the light receiving surface 10 is composed of a third light receiving area in the shape of a sphere or an ellipsoid and M3 fourth light receiving areas in the shape of a curved quadrilateral, M3 should be greater than or equal to 5. The above-mentioned M3 fourth light receiving areas form at least two curved annular areas around the optical axis. Each of the at least two curved annular areas is composed of at least two fourth light receiving areas. The inner edge of one of the at least two curved annular areas is connected to the edge of the above-mentioned third light receiving area. In any two connected curved annular areas of the at least two curved annular areas, the number of fourth light receiving areas contained in the curved annular area close to the above-mentioned third light receiving area is less than the number of fourth light receiving areas contained in the curved annular area away from the above-mentioned third light receiving area. In other words, the above-mentioned M3 fourth light receiving areas in the shape of curved quadrilaterals will form at least two curved annular areas with the third light receiving area as the center. The centers of these curved annular areas are all on the optical axis of the light receiving surface 10, and the larger the size of the curved annular area, the more fourth light receiving areas it contains.

[0103] For example, please refer to Figure 7, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 7 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 7, there are multiple curved annular areas on the periphery of the third light receiving area (only 6 curved annular areas are schematically drawn in Figure 7, and include curved annular area k1 and curved annular area k2), and the inner edge of the smallest curved annular area k1 among these multiple curved annular areas is connected to the edge of the third light receiving area. It should be noted here that, for any one curved annular area, its edge close to the third light receiving area is called the inner edge, and the edge away from the third light receiving area is called the outer edge. It should be understood that, for any two connected curved annular areas of the at least two curved annular areas mentioned above, the inner edge of the larger curved annular area is connected to the outer edge of the smaller curved annular area. As shown in Figure 7, curved annular area k1 and curved annular area k2 are adjacent curved annular areas, and the size of curved annular area k2 is larger than that of curved annular area k1. Therefore, the outer edge of curved annular area k1 is connected to the inner edge of curved annular area k2. At the same time, because curved annular area k1 is closer to the third light receiving area, the number of fourth light receiving areas included in curved annular area k1 is smaller than the number of fourth light receiving areas included in curved annular area k2. It should be noted that the curved annular area connected to the third light receiving area (i.e., curved annular area k1 shown in Figure 7) should include at least two fourth light receiving areas.

[0104] In the above implementation, when the light receiving surface 10 is composed of a third light receiving area having a spherical or ellipsoidal shape and M3 fourth light receiving areas having a curved quadrilateral shape, the M3 fourth light receiving areas having a curved quadrilateral shape are formed into at least two curved annular areas with the third light receiving area as the center. The centers of these curved annular areas are all on the optical axis of the light receiving surface 10, and the larger the curved annular area, the more fourth light receiving areas it contains. This structure can improve the communication bandwidth of the light receiver 100 while reducing the impact of aberrations on the receiving performance of the light receiver 100, and can also facilitate the design and production of the light receiving surface 10.

[0105] In some feasible implementations, the light receiving surface 10 can be a spliced ​​curved surface, and it can be spliced ​​together by N1 planes (for the convenience of distinction, the first plane will be used instead of the expression below). One of the N1 first planes is a light receiving area in the above-mentioned N1 light receiving areas. In this case, the shape of any light receiving area in the above-mentioned N1 light receiving areas is an axisymmetric quadrilateral, an axisymmetric pentagon or an axisymmetric hexagon. In other words, the shape of any first plane in the above-mentioned N1 first planes is an axisymmetric quadrilateral, an axisymmetric pentagon or an axisymmetric hexagon.

[0106] For example, please refer to Figure 8, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 8 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 8, the light receiving surface 10 is a spherical spliced ​​surface composed of multiple first planes. Each first plane it contains is a light receiving area. It should be understood that when the light receiving surface 10 is a spliced ​​surface, for the above-mentioned N1 light receiving areas, the shapes of each light receiving area can be all the same or partially the same, as long as the light receiving surface 10 can be spliced ​​together, and the present application does not impose specific restrictions on this. For example, the shape of a part of the light receiving area can be an axisymmetric pentagon, while the shape of another part of the light receiving area can be an axisymmetric hexagon. Alternatively, the shape of all the light receiving areas can be an axisymmetric pentagon.

[0107] In the above implementation, the light receiving surface 10 is designed as a structure of spliced ​​curved surfaces, and each spliced ​​surface is a light receiving area used to set up a first PD array. This approach not only improves the communication bandwidth of the light receiver 100 while preventing the impact of aberrations on the receiving performance of the light receiver 100, but also further reduces the complexity of the design and production of the light receiving surface 10.

[0108] In some feasible implementations, the light receiving surface 10 may be a plane (for ease of distinction, the second plane will be used instead below). In this case, each of the N1 light receiving areas may be shaped like an axisymmetric quadrilateral. In other words, the light receiving surface 10 may be a planar structure composed of a plurality of axisymmetric quadrilateral light receiving areas.

[0109] For example, please refer to Figure 9, which is another structural schematic diagram of the light receiving surface provided by this application. It should be understood that Figure 9 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 9, the light receiving surface 10 is a plane composed of a plurality of light receiving areas with an axisymmetric quadrilateral shape. It should be understood that Figure 9 is only an exemplary drawing of the arrangement between the light receiving areas. In actual implementation, the light receiving areas can also adopt other possible arrangements, and this application does not impose specific restrictions on this.

[0110] In the above implementation, the light receiving surface 10 is designed as a plane composed of multiple axially symmetrical quadrilateral light receiving areas. On the one hand, it can improve the communication bandwidth of the light receiver, and on the other hand, it can reduce the complexity of the design and production of the light receiving surface 10.

[0111] Specifically, in this case, each of the N1 light receiving areas is of the same or similar size. Furthermore, at least one edge of any light receiving area is connected to two other light receiving areas. For example, as shown in FIG9 , each of the N1 light receiving areas is of the same size and arranged in a staggered manner, thereby ensuring that each light receiving area has at least one edge connected to two other light receiving areas. This implementation effectively ensures that the light spot formed by the signal light on the light receiving surface 10 only falls on a smaller number of first PD arrays.

[0112] Alternatively, when the light receiving surface 10 can be a second plane, each of the N1 light receiving areas can be shaped as an axisymmetric hexagon. In other words, the light receiving surface 10 can be a planar structure composed of a plurality of axisymmetric hexagonal light receiving areas.

[0113] For example, please refer to Figure 10, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 10 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 10, the light receiving surface 10 is a plane composed of a plurality of hexagonal light receiving areas with an axially symmetric shape. It should be understood that Figure 10 is only an exemplary drawing of the arrangement between the light receiving areas. In actual implementation, the light receiving areas can also adopt other possible arrangements, and this application does not impose specific restrictions on this.

[0114] In the above implementation, the light receiving surface 10 is designed as a plane composed of multiple axially symmetrical hexagonal light receiving areas. On the one hand, it can improve the communication bandwidth of the light receiver, and on the other hand, it can reduce the complexity of the design and production of the light receiving surface 10.

[0115] In some feasible implementations, the light receiving surface 10 may be a distorted plane, and the shape of each of the N1 light receiving areas is a distorted axisymmetric quadrilateral, or each of the N1 light receiving areas is a distorted axisymmetric hexagon. It should be noted that the distorted plane involved in the present application refers to a plane obtained by a normal regular plane after distortion. The distortion methods involved in the present application mainly include barrel distortion and pincushion distortion. In this case, the N1 light receiving areas will be centrally symmetrical about the optical axis of the light receiving surface 10, and the area difference between the light receiving area i in the N1 light receiving areas and the central light receiving area of ​​the N1 light receiving areas is smaller than the area difference between the light receiving area j in the N1 light receiving areas and the central light receiving area. The central light receiving area is the light receiving area through which the optical axis of the light receiving surface 10 passes, and the distance between the light receiving area i and the central light receiving area is smaller than the distance between the light receiving area j and the central light receiving area.

[0116] For example, please refer to Figure 11, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 11 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 11, the light receiving surface 10 is a distorted plane composed of N1 light receiving areas with distorted axisymmetric quadrilateral shapes. There is only one central light receiving area among the above N1 light receiving areas, and the N1-1 light receiving areas other than the central light receiving area among the above N1 light receiving areas are centrally symmetric about the central light receiving area. In addition, the farther the light receiving area is from the central light receiving area, the greater the area difference between it and the central light receiving area. As shown in Figure 11, if any light receiving area i is closer to the central light receiving area than any light receiving area j, then the area difference between the light receiving area i and the central light receiving area is smaller than the area difference between the light receiving area j and the central light receiving area.

[0117] For another example, please refer to Figure 12, which is another structural schematic diagram of the light receiving surface provided by the present application. It should be understood that Figure 12 is a top view of the light receiving surface 10 in the direction of the optical axis, and does not show the first PD array contained in each light receiving area. As shown in Figure 12, the light receiving surface 10 is a distorted plane composed of N1 light receiving areas with distorted axially symmetrical hexagonal shapes. There is only one central light receiving area passed by the optical axis, and the N1-1 light receiving areas other than the central light receiving area among the N1 light receiving areas are centrally symmetrical about the central light receiving area. Similarly, the farther the light receiving area is from the central light receiving area, the greater the area difference between it and the central light receiving area. As shown in Figure 12, the light receiving area i is closer to the central light receiving area than the light receiving area j, so the area difference between the light receiving area i and the central light receiving area is smaller than the area difference between the light receiving area j and the central light receiving area.

[0118] Optionally, in a specific implementation, the above-mentioned distortion plane (or light receiving surface 10) can be obtained by distorting a regular plane (for the convenience of distinction, it will be expressed as a third plane below). The third plane contains N1 fifth light receiving areas. The shape of each fifth light receiving area in the N1 fifth light receiving areas is an axisymmetric hexagon or an axisymmetric quadrilateral. And one light receiving area among the N1 light receiving areas can be obtained by distorting one of the fifth light receiving areas among the N1 fifth light receiving areas. In particular, the central light receiving area on the light receiving surface 10 is usually obtained by distorting the fifth light receiving area in the above-mentioned N1 fifth light receiving areas that is passed through by the optical axis of the third plane.

[0119] For example, please refer to Figure 13, which is a schematic diagram of the generation of the light receiving surface provided in the present application. As shown in Figure 13, in the case where the light receiving surface 10 is a distorted plane, the light receiving surface 10 can be obtained by distorting a regular third plane, and the third plane is composed of N1 fifth light receiving areas with an axisymmetric quadrilateral shape. In addition, the central light receiving area on the light receiving surface 10 is obtained by distorting the fifth light receiving area passed by the optical axis of the third plane among the above-mentioned N1 fifth light receiving areas. It should be understood that the specific structure of the third plane is similar to the specific structure of the second plane described above, so reference can be made to the above text.

[0120] For another example, please refer to Figure 14, which is another schematic diagram of generating a light receiving surface provided by the present application. As shown in Figure 14, when the light receiving surface 10 is a distorted plane, the light receiving surface 10 can be obtained by distorting a regular third plane, and the third plane is composed of N1 fifth light receiving areas with an axisymmetric hexagonal shape. In addition, the central light receiving area on the light receiving surface 10 is obtained by distorting the fifth light receiving area of ​​the N1 fifth light receiving areas that is passed through by the optical axis of the third plane.

[0121] It should be understood that FIG13 or FIG14 shows a scene using pincushion distortion. In actual implementation, barrel distortion can also be performed on the third plane to obtain the above-mentioned distorted plane. Of course, other possible distortion methods can also be used to process and obtain the above-mentioned distorted plane, and this application does not impose specific limitations on this.

[0122] In some feasible implementations, for each light receiving area on the light receiving surface 10, it can be further divided into multiple small light receiving areas. At the same time, the first PD array set on each light receiving area can also be composed of multiple small PD arrays, and a small PD array is set in each small light receiving area. Similarly, these small light receiving areas and small PD arrays can be further divided into smaller units in a similar manner. In other words, for each light receiving area provided in the present application, it can adopt a multi-level division method, which can be divided into multiple levels of light receiving areas, and multiple small levels of light receiving areas constitute a large level of light receiving area. Similarly, for each first PD array provided in the present application, it can also adopt a multi-level division method, which can be divided into multiple levels of PD arrays, and multiple small levels of PD arrays constitute a large level of PD array. In a scenario where the number of PDs is large, the use of this multi-level division method can effectively ensure that the number of PDs contained in the minimum PD array is small, thereby effectively improving the communication bandwidth of the optical receiver 100.

[0123] It should be understood that for the multi-level division method described above, the implementation processes at different levels are similar. For ease of understanding, the following will be explained illustratively using the two-level division method as an example.

[0124] In an optional implementation, each of the N1 light receiving areas may include N3 first sub-light receiving areas, and the first PD array provided on each light receiving area includes N3 second PD arrays, and one second PD array is provided in one first sub-light receiving area. N3 is a positive integer greater than or equal to 2. It can also be understood that the light receiving area adopts a two-level division method, and each light receiving area is divided into multiple smaller sub-light receiving areas. Similarly, the PD array also adopts a two-level division method, and each first PD array is divided into N3 smaller second PD arrays.

[0125] The following takes one of the N1 light receiving areas 102 as an example. Please refer to Figure 15, which is another structural schematic diagram of the light receiving area provided in the present application. It should be understood that Figure 15 is shown with the shape of the light receiving area 102 as an axisymmetric curved hexagon, which is only exemplary. As shown in Figure 15, the light receiving area 102 may include a plurality of first sub-light receiving areas with an axisymmetric curved hexagonal shape, and the first PD array set on the light receiving area 102 may include a plurality of second PD arrays, and a second PD array is set in a first sub-light receiving area. For example, the second PD array 1022 is set in the first sub-light receiving area 1021.

[0126] Optionally, assuming that the total number of PDs included in the N1 first PD arrays is X, then the N3 and Here, the above limit is applied to the number of the first sub-light receiving areas to ensure that the number of PDs included in each second PD array is not too large, thereby improving the communication bandwidth of the optical receiver 100.

[0127] Optionally, when the light receiving surface 10 is a continuous quadratic surface, the shape of each of the N3 first sub-light receiving areas is an axisymmetric curved quadrilateral or an axisymmetric curved hexagon. Alternatively, when the light receiving surface 10 is a continuous quadratic surface, all PDs included in each of the N3 second PD arrays are distributed within the corresponding first sub-light receiving area according to an axisymmetric curved quadrilateral or an axisymmetric curved hexagon.

[0128] When the light receiving surface 10 is a spliced ​​curved surface or a second flat surface, each of the N3 first sub-light receiving areas is shaped like an axisymmetric quadrilateral or an axisymmetric hexagon. In other words, when the light receiving surface 10 is a spliced ​​curved surface or a second flat surface, all PDs contained in each of the N3 second PD arrays are distributed within the corresponding first sub-light receiving area in an axisymmetric quadrilateral or an axisymmetric hexagon.

[0129] When the light receiving surface 10 is a distorted plane, the shape of each of the N3 first sub-light receiving areas is a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon. In other words, all PDs included in each of the N3 second PD arrays are distributed within the corresponding first sub-light receiving area in the shape of a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon.

[0130] Optionally, in actual work, the N3 second PD arrays contained in each of the above-mentioned first PD arrays can be used to convert the received light energy into N3 second electrical parameters and output them. That is to say, when light energy reaches a certain first PD array, the N3 second PD arrays in the first PD array will output N3 second electrical parameters. Here, the first electrical parameters output by each first PD array mentioned above can be composed of the N3 second electrical parameters output by the N3 second PD arrays contained in each first PD array. It should also be noted that the N3 second PD arrays contained in each first PD array are connected to a second controllable switch device, and the output of each second PD array can be controlled by each second controllable switch device, which can reduce the number of electrical ports of the optical receiver 100.

[0131] In another feasible implementation, each of the N1 light receiving areas mentioned above includes not only N3 first sub-light receiving areas, but also N4 second sub-light receiving areas. And the sum of the areas of the N3 first sub-light receiving areas and the N4 second sub-light receiving areas contained in each light receiving area is equal to the area of ​​each light receiving area. Part of the edge of each second sub-light receiving area in the N4 second sub-light receiving areas is connected to the part of the edge of each light receiving area, and the shape of each second sub-light receiving area is irregular and different from the shape of each first sub-light receiving area. In other words, each second sub-light receiving area in the N4 second sub-light receiving areas is located at the edge of the light receiving area where it is located, and each second sub-light receiving area cannot contain a first sub-light receiving area. N4 third PD arrays are arranged on the N4 second sub-light receiving areas, and one third PD array is arranged on one second sub-light receiving area. N4 is a positive integer greater than or equal to 1 and less than N3.

[0132] For example, please refer to Figure 16, which is another structural schematic diagram of the light receiving area provided in this application. As shown in Figure 16, the light receiving area 102 not only includes a plurality of first sub-light receiving areas, but also includes a plurality of second sub-light receiving areas (it should be understood that 6 second sub-light receiving areas are shown in Figure 16, which are respectively located at the 6 vertices of the light receiving area 102). These second sub-light receiving areas are all located at the edge of the light receiving area 102, and a third PD array is provided on each second sub-light receiving area. For example, the second sub-light receiving area 1023 among the above-mentioned multiple second sub-light receiving areas is located at the edge of the light receiving area 102, and a third PD array 1024 is provided therein.

[0133] In the above implementation, the portion of each light receiving area that cannot form a complete first sub-light receiving area is divided into a special second sub-light receiving area, and all PDs contained in each second sub-light receiving area are connected together to form a special third PD array. This ensures that corresponding PDs are evenly distributed at each position within each light receiving area, thereby ensuring the receiving performance of the optical receiver 100.

[0134] Optionally, in actual operation, the N3 second PD arrays contained in each of the N3 first PD arrays can be used to convert the received light energy into N3 second electrical parameters and output them, and the N4 third PD arrays contained in each first PD array can also be used to convert the received light energy into N4 third electrical parameters and output them. In this case, the first electrical parameter output by each first PD array mentioned above can be composed of the N3 second electrical parameters output by the N3 second PD arrays contained in each first PD array and the N4 third electrical parameters output by the N4 third PD arrays contained in each first PD array. It should also be noted that each of the N4 third PD arrays contained in each first PD array is connected to a second controllable switch device, and the output of each third PD array can be controlled by each second controllable switch device.

[0135] In some feasible implementations, for some or all of the N1 first PD arrays, all PDs contained therein may form multiple PD networks, and each of the multiple PD networks may be composed of multiple PDs connected in series. Since the specific structure of each first PD array is the same or similar, to avoid redundancy, the specific structure of the first PD array will be described below using any one of the N1 first PD arrays as an example.

[0136] In an optional implementation, any of the N1 first PD arrays may include N5 first PD networks. All PDs within each of the N5 first PD networks are connected in series to form a zigzag zigzag line structure. The extension direction of the zigzag zigzag line structure formed by each first PD network is fixed and parallel to a symmetry axis of the light receiving area where the first PD array is located. The number of PDs included in each first PD network is equal to or greater than a first threshold, and N5 is a positive integer greater than or equal to 2.

[0137] For example, please refer to Figure 17, which is another structural schematic diagram of the light receiving area provided by the present application. It should be understood that Figure 17 is an example of any one light receiving area 103 in the above-mentioned N1 light receiving areas. As shown in Figure 17, a first PD array 1031 is provided on the light receiving area 103, and the first PD array is composed of multiple first PD networks. Each first PD network is independent of each other, and all PDs in each first PD network are connected in series to form a zigzag zigzag line structure. Taking the first PD network 1032 as an example, the multiple PDs it contains are connected in series to form a zigzag zigzag line structure. The extension direction of the first PD network 1032 (which can also be understood as the routing direction of the first PD network) is fixed and parallel to a symmetry axis of the light receiving area 103. It should be noted that the N5 first PD networks contained in any first PD array are independent of each other. In actual implementation, a second controllable switch device can be connected to the output end of each first PD network, and the output of each first PD network can be flexibly controlled by each second controllable switch device.

[0138] In the above implementation, the first PD array is formed by multiple independent first PD networks, and each first PD network adopts a zigzag zigzag line structure, which can effectively shorten the delay in the circuit, thereby further improving the communication bandwidth of the optical receiver 100.

[0139] Optionally, for any first PD array, any three adjacent PDs in the zigzag zigzag line structure formed by each first PD network contained therein may be arranged in an isosceles triangle.

[0140] For example, please refer to Figure 18, which is a schematic diagram of the zigzag zigzag line structure provided by the present application. As shown in (a) in Figure 18, for any first PD network, any three adjacent PDs among all the PDs contained therein will be arranged in an isosceles triangle, or in other words, the closed figure formed by the connection of any three adjacent PDs is an isosceles triangle. Alternatively, for any first PD array, any four adjacent PDs in the zigzag zigzag line structure formed by each first PD network are arranged in a rectangular manner. As shown in (b) in Figure 18, for any first PD network, any four adjacent PDs among all the PDs contained therein will be arranged in a rectangular manner, or in other words, the closed figure formed by the connection of any four adjacent PDs is a rectangle. It should be understood that the above two implementation methods are only exemplary. In actual implementation, the PDs contained in any first PD network may also be arranged in other ways, as long as it is ensured that they can form a zigzag zigzag line structure, and the present application does not impose specific restrictions on this.

[0141] Furthermore, in actual operation, the N5 first PD networks included in any of the above-mentioned first PD arrays can be used to convert the received light energy into a corresponding fifth electrical parameter and output it. In other words, when the light spot of the first signal light falls on any of the first PD arrays, the N5 first PD networks included in any of the first PD arrays will output N5 fifth electrical parameters. It should be understood that in this case, the first electrical parameter output by any of the first PD arrays can be obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any of the first PD arrays.

[0142] In another optional implementation, any of the above-mentioned first PD arrays includes not only N5 first PD networks, but also N6 second PD networks. N6 is a positive integer greater than or equal to 1 and less than N5. There is at least one first PD network between each of the N6 second PD networks and the center point of the light receiving area where any of the above-mentioned first PD arrays is located. It can also be understood that the above-mentioned N6 second PD networks are all located at the edge of the light receiving area where any of the above-mentioned first PD arrays is located. The number of PDs contained in each of the above-mentioned N6 second PD networks is greater than the above-mentioned first threshold. All PDs contained in each of the above-mentioned N6 second PD networks are connected in series to form a zigzag line structure with an unfixed extension direction. Some of the PDs contained in each second PD network can be connected in series to form a zigzag line structure, and the extension direction of the formed zigzag line structure is parallel to a symmetry axis of the light receiving area where any of the above-mentioned first PD arrays is located. In other words, each of the above-mentioned N6 second PD networks may include a portion of a zigzag line structure.

[0143] For example, see Figure 19, which is another schematic diagram of the structure of the light receiving region provided in this application. As shown in Figure 19, the first PD array provided in the light receiving region 103 may also include a second PD network. The second PD network is located at the edge of the light receiving region 103, and a portion of the PDs within the second PD network form a zigzag zigzag line structure.

[0144] It should be noted that the N6 second PD networks contained in any first PD array are independent of each other. In actual implementation, a second controllable switch device can be connected to the output end of each second PD network, and the output of each second PD network can be flexibly controlled by each second controllable switch device.

[0145] In the above implementation, some PDs in the first PD array that are located at the edge of the light receiving area and cannot form an integer number of first PD networks are connected in series to form a special second PD network. This allows the first PD array to be composed of multiple identical or different PD networks, thereby ensuring the receiving performance of the optical receiver 100.

[0146] Furthermore, in the case where any of the above-mentioned first PD arrays is composed of N5 first PD networks and N6 second PD networks, in actual operation, the N5 first PD networks included in any of the first PD arrays can be used to convert the received light energy into N5 fifth electrical parameters and output them, and the N6 second PD networks included in any of the first PDs can be used to convert the received light energy into N6 sixth electrical parameters and output them. That is to say, when the light spot of the first signal light falls on any of the first PD arrays, the N5 first PD networks can output N5 fifth electrical parameters, and the N6 second PD networks can output N6 sixth electrical parameters. The first electrical parameter output by any of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any of the first PD arrays and the N6 sixth electrical parameters output by the N6 second PD networks included in any of the first PD arrays.

[0147] In another optional implementation, any of the aforementioned first PD arrays includes not only N5 first PD networks but also N7 third PD networks. N7 is a positive integer greater than or equal to 1 and less than N5. At least one first PD network exists between each of the N7 third PD networks and the center point of the light receiving area where any of the aforementioned first PD arrays is located. It can also be understood that the N7 third PD networks are located at the edge of the light receiving area where any of the aforementioned first PD arrays is located. The number of PDs included in each of the N7 second PD networks is greater than the first threshold. All PDs included in each of the N7 third PD networks are connected in series to form a zigzag line structure with a non-fixed extension direction. Some PDs included in each of the third PD networks are connected in series to form a zigzag line structure with a non-fixed extension direction. Furthermore, none of the N7 third PD networks contains a zigzag line structure. As shown in FIG. 19 , the first PD array provided on the light receiving area 103 may further include a third PD network. The third PD network is located at the edge of the light receiving area 103 , and the third PD network does not have a zigzag structure.

[0148] It should be noted that the N7 third PD networks included in any first PD array are independent of each other. In actual implementation, a second controllable switch device can be connected to the output end of each third PD network, and the output of each third PD network can be flexibly controlled by each second controllable switch device.

[0149] In the above implementation, some PDs in the first PD array that are located at the edge of the light receiving area and cannot form an integer number of first PD networks are connected in series to form a special third PD network. This also enables the first PD array to be composed of multiple identical or different PD networks, thereby ensuring the receiving performance of the optical receiver 100.

[0150] Furthermore, in the case where any of the above-mentioned first PD arrays is composed of N5 first PD networks and N7 third PD networks, in actual operation, the N5 first PD networks included in any of the first PD arrays can be used to convert the received light energy into N5 fifth electrical parameters and output them, and the N7 third PD networks included in any of the first PDs can be used to convert the received light energy into N7 seventh electrical parameters and output them. That is to say, when the light spot of the first signal light falls on any of the first PD arrays, the N5 first PD networks can output N5 fifth electrical parameters, and the N7 second PD networks can output N7 seventh electrical parameters. The first electrical parameter output by any of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any of the first PD arrays and the N7 seventh electrical parameters output by the N7 third PD networks included in any of the first PD arrays.

[0151] It should be understood that the foregoing description describes a situation in which a first PD array is composed of multiple first PD networks and one or more second PD networks, and a situation in which a first PD array is composed of multiple first PD networks and one or more third PD networks. In actual implementation, a first PD array may be composed of multiple first PD networks, one or more second PD networks and one or more third PD networks, and this application does not impose specific restrictions on this.

[0152] It should be noted that the controllable switch device involved in this application can specifically be a mechanical switch, a controllable switch tube, or other form of electronic device that can be controlled to turn on or off by a controller. This application does not limit the specific type of controllable switch. For example, the controllable switch tube can be a turn-off thyristor, a power transistor, a power field-effect transistor, etc. The controller involved in this application can specifically be any form of device with data processing and control functions, such as a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

[0153] The present application also provides an optical receiver. Please refer to Figure 20, which is a schematic diagram of the structure of an optical receiver provided by the present application. As shown in Figure 20, the optical receiver 200 may include the optical receiver 100 described above and a signal processing module 300. The signal processing module 300 is connected to the optical receiver 100.

[0154] In actual operation, the optical receiver 100 can be configured to receive the first signal light through N2 target first PD arrays among the N1 first PD arrays it contains, and output N2 eighth electrical parameters. N2 is a positive integer greater than or equal to 1 and less than N1. The signal processing module 300 can be configured to process the N2 eighth electrical parameters to obtain the data to be transmitted carried by the first signal light.

[0155] In an optional implementation, please refer to Figure 21, which is another schematic diagram of the structure of an optical receiver provided by this application. As shown in Figure 21, the signal processing module 300 may include an analog-to-digital converter 301 and a digital signal processor 302. The optical receiver 100 is connected to the digital signal processor 302 via the analog-to-digital converter 301.

[0156] In actual operation, the analog-to-digital converter 301 is used to perform analog-to-digital conversion on the N2 eighth electrical parameters output by the optical receiver 100 to obtain N2 digital signals. The digital signal processor 302 is used to process the N2 digital signals to obtain the data to be transmitted.

[0157] The present application also provides an optical communication system. Please refer to Figure 22, which is a schematic diagram of the structure of the optical communication system provided by the present application. As shown in Figure 22, the optical communication system 400 may include the optical receiver 200 and optical transmitter 500 described above. In actual operation, the optical transmitter 500 is used to transmit a first signal light carrying data to be transmitted. The optical receiver 200 is used to receive the first signal light and process it to obtain the data to be transmitted.

[0158] The present application also provides an optical receiving method, which is applicable to the optical receiver 200 described above. The specific structure and function of the optical receiver 200 can be found in the corresponding description above and will not be repeated here. Please refer to Figure 23, which is a flow chart of an optical receiving method provided by the present application. As shown in Figure 23, the method may include the following steps:

[0159] S231 , when the first signal light reaches the light receiving surface, obtain N2 eighth electrical parameters output by N2 target first PD arrays in the N1 first PD arrays on the light receiver.

[0160] In some feasible implementations, when the optical receiver 200 determines that the first signal light has reached the light receiving surface 10, it can obtain N2 eighth electrical parameters generated by the N2 target first PD arrays among the N1 first PD arrays output by the optical receiver 100. Here, the specific process of obtaining the N2 eighth electrical parameters generated by the N2 target first PD arrays can be found in the above description of the function of the optical receiver 100 and will not be repeated here.

[0161] Optionally, before obtaining the N2 eighth electrical parameters, when the optical receiver 200 determines that the first signal light has reached the light receiving surface 10, it may sequentially obtain the eighth electrical parameter output by each of the N1 first PD arrays through the optical receiver 100. When the optical receiver 100 determines that the value of the eighth electrical parameter output by any of the N1 first PD arrays is equal to or greater than a preset electrical parameter value, the any first PD array and the N2-1 first PD arrays surrounding the any first PD array may be determined as the N2 target first PD arrays, and the optical receiver 100 may be controlled to output only the N2 eighth electrical parameters.

[0162] S232: Process the N2 eighth electrical parameters by a signal processing module to obtain data to be transmitted carried by the first signal light.

[0163] In some feasible implementations, after obtaining the N2 eighth electrical parameters, the optical receiver 200 may process the N2 eighth electrical parameters via the signal processing module 300 to obtain the data to be transmitted carried by the first signal light. In a specific implementation, the optical receiver 200 may perform analog-to-digital conversion on the N2 eighth electrical parameters via the analog-to-digital converter 301 in the signal processing module 300 to obtain N2 digital signals. The optical receiver 200 may then process the N2 digital signals via the digital signal processor 302 in the signal processing module 300 to obtain the data to be transmitted.

[0164] The optical receiving method provided in the present application is implemented based on the optical receiver 200. Since the optical receiver 200 adopts the optical receiver 100 with a large communication bandwidth provided in the present application, the applicability and practicality of the optical receiving method provided in the present application are also improved.

[0165] In the embodiments provided in this application, it should be understood that the disclosed systems, devices or methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0166] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0167] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0168] The terms "first," "second," "third," and "fourth," etc., in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0169] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0170] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of this application. It should be understood that the above description is only the specific implementation methods of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in the scope of protection of this application.

Claims

1. An optical receiver, characterized in that: The optical receiver comprises a light receiving surface and N1 first photodetector PD arrays arranged on the light receiving surface, wherein: The light receiving surface includes N1 light receiving areas, the N1 first PD arrays are respectively arranged in the N1 light receiving areas, each of the N1 first PD arrays includes a plurality of connected PDs, and the shape of any light receiving area in the N1 light receiving areas is an axisymmetric curved quadrilateral, an axisymmetric curved pentagon, an axisymmetric curved hexagon, a sphere or an ellipsoid, or the shape of any light receiving area is an axisymmetric quadrilateral, an axisymmetric pentagon, an axisymmetric hexagon, or the shape of any light receiving area is a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon, and N1 is a positive integer greater than or equal to 2; Each of the N1 first PD arrays is used to perform photoelectric conversion on received light energy through the included multiple PDs and output a first electrical parameter obtained by the conversion.

2. The optical receiver according to claim 1, characterized in that The light receiving surface is a continuous quadratic surface, the shape of each of the N1 light receiving areas is an axisymmetric curved pentagon, and N1 is greater than or equal to 6; Alternatively, each of the N1 light receiving areas has an axially symmetric curved hexagonal shape, and N1 is greater than or equal to seven.

3. The optical receiver according to claim 1, characterized in that The light receiving surface is a continuous quadratic surface, the N1 light receiving areas are composed of M1 first light receiving areas and M2 second light receiving areas, each of the M1 first light receiving areas is an axisymmetric curved pentagon, and each of the M2 second light receiving areas is an axisymmetric curved hexagon, M1 is a positive integer greater than or equal to 1, and M2 is a positive integer greater than or equal to 5.

4. The optical receiver according to claim 1, characterized in that The light receiving surface is a continuous quadratic surface, the N1 light receiving areas are composed of 1 third light receiving area and M3 fourth light receiving areas, the optical axis of the light receiving surface passes through the third light receiving area, the shape of the third light receiving area is a spherical surface or an ellipsoidal surface, the shape of each of the M3 fourth light receiving areas is a curved quadrilateral, and M3 is a positive integer greater than or equal to 2.

5. The optical receiver according to claim 4, characterized in that M3 is greater than or equal to 5, and the M3 fourth light receiving areas form at least two curved annular areas around the optical axis, each of the at least two curved annular areas is composed of at least two fourth light receiving areas, and the inner edge of one of the at least two curved annular areas is connected to the edge of the third light receiving area. Among any two connected curved annular areas among the at least two curved annular areas, the number of fourth light receiving areas contained in the curved annular area close to the third light receiving area is less than the number of fourth light receiving areas contained in the curved annular area far from the third light receiving area.

6. The optical receiver according to claim 1, characterized in that The light receiving surface is a spliced ​​curved surface, and is formed by splicing N1 first planes, one of the N1 first planes is a light receiving area among the N1 light receiving areas, and the shape of any one of the N1 light receiving areas is an axisymmetric quadrilateral, an axisymmetric pentagon, or an axisymmetric hexagon.

7. The optical receiver according to claim 1, characterized in that The light receiving surface is a second plane, and the shape of each of the N1 light receiving areas is an axisymmetric quadrilateral; Alternatively, each of the N1 light receiving areas has an axisymmetric hexagonal shape.

8. The optical receiver according to claim 1, characterized in that The light receiving surface is a distorted plane, and the shape of each of the N1 light receiving areas is a distorted axisymmetric quadrilateral, or each of the N1 light receiving areas is a distorted axisymmetric hexagon; The N1 light receiving areas are centrally symmetric about the optical axis of the light receiving surface, and the area difference between the light receiving area i among the N1 light receiving areas and the central light receiving area of ​​the N1 light receiving areas is smaller than the area difference between the light receiving area j among the N1 light receiving areas and the central light receiving area, the central light receiving area is the light receiving area through which the optical axis of the light receiving surface passes, and the distance between the light receiving area i and the central light receiving area is smaller than the distance between the light receiving area j and the central light receiving area.

9. The optical receiver according to claim 8, characterized in that The distortion plane is obtained by distorting the third plane, and the third plane contains N1 fifth light receiving areas, and the shape of each of the N1 fifth light receiving areas is an axisymmetric hexagon or an axisymmetric quadrilateral, and one of the N1 light receiving areas is obtained by distorting one of the N1 fifth light receiving areas.

10. The optical receiver according to claim 8 or 9, characterized in that: The light receiving surface is obtained by subjecting the third plane to barrel distortion or pincushion distortion.

11. The optical receiver according to any one of claims 1 to 10, characterized in that: Each of the N1 light receiving areas includes N3 first sub-light receiving areas, and the first PD array set on each light receiving area includes N3 second PD arrays, and a second PD array is set in a first sub-light receiving area, wherein N3 is a positive integer greater than or equal to 2.

12. The optical receiver according to claim 11, characterized in that N3 and The difference between is less than or equal to a preset difference, where X is the total number of PDs included in the N1 first PD arrays.

13. The optical receiver according to claim 11 or 12, characterized in that: In the case where the light receiving surface is a continuous quadratic surface, the shape of each of the N3 first sub-light receiving areas is an axisymmetric curved quadrilateral or an axisymmetric curved hexagon; Alternatively, in the case where the light receiving surface is a spliced ​​curved surface or a second plane, the shape of each of the N3 first sub-light receiving areas is an axisymmetric quadrilateral or an axisymmetric hexagon; Alternatively, in the case where the light receiving surface is a distorted plane, the shape of each of the N3 first sub-light receiving areas is a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon.

14. The optical receiver according to any one of claims 11 to 13, characterized in that: The N3 second PD arrays included in each first PD array are used to convert the received light energy into N3 second electrical parameters and output them, and the first electrical parameters output by each first PD array are composed of the N3 second electrical parameters output by the N3 second PD arrays included in each first PD array.

15. The optical receiver according to any one of claims 11 to 14, characterized in that: Each of the light receiving areas also includes N4 second sub-light receiving areas, and the sum of the areas of the N3 first sub-light receiving areas and the N4 second sub-light receiving areas contained in each of the light receiving areas is equal to the area of ​​each of the light receiving areas, a partial edge of each of the N4 second sub-light receiving areas is connected to a partial edge of each of the light receiving areas, a shape of each of the second sub-light receiving areas is irregular and different from a shape of each of the first sub-light receiving areas, and N4 third PD arrays are arranged on the N4 second sub-light receiving areas, and N4 is a positive integer greater than or equal to 1 and less than N3.

16. According to the optical receiver of claim 15, the N3 second PD arrays included in each first PD array are used to convert the received light energy into N3 second electrical parameters and output them, the N4 third PD arrays included in each first PD array are used to convert the received light energy into N4 third electrical parameters and output them, and the first electrical parameters output by each first PD array are composed of the N3 second electrical parameters output by the N3 second PD arrays included in each first PD array and the N4 third electrical parameters output by the N4 third PD arrays included in each first PD array.

17. The optical receiver according to any one of claims 1 to 10, characterized in that: Any first PD array among the N1 first PD arrays includes N5 first PD networks, and all PDs in each of the N5 first PD networks are connected in series to form a zigzag zigzag line structure, and the extension direction of the zigzag zigzag line structure formed by each first PD network is fixed and parallel to a symmetry axis of the light receiving area where the any first PD array is located, and the number of PDs included in each first PD network is equal to or greater than a first threshold, and N5 is a positive integer greater than or equal to 2.

18. The optical receiver according to claim 17, characterized in that Any three adjacent PDs in the zigzag zigzag line structure formed by each first PD network are arranged in an isosceles triangle, or any four adjacent PDs in the zigzag zigzag line structure formed by each first PD network are arranged in a rectangle.

19. The optical receiver according to claim 17 or 18, characterized in that: The N5 first PD networks included in any one of the N1 first PD arrays are used to convert the received light energy into N5 fifth electrical parameters and output them. The first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays.

20. The optical receiver according to claim 17 or 18, characterized in that Any one of the first PD arrays also includes N6 second PD networks, and there is at least one first PD network between each of the N6 second PD networks and the center point of the light receiving area where the any one of the first PD array is located. The number of PDs contained in each of the N6 second PD networks is greater than the first threshold value, and all the PDs contained in each of the second PD networks are connected in series to form a zigzag line structure with an unfixed extension direction. Some of the PDs contained in each of the second PD networks are connected in series to form a zigzag line structure and the extension direction of the formed zigzag line structure is parallel to a symmetry axis of the light receiving area where the any one of the first PD array is located. N6 is a positive integer greater than or equal to 1 and less than N5.

21. The optical receiver according to claim 20, characterized in that The N5 first PD networks included in any one of the N1 first PD arrays are used to convert the received light energy into N5 fifth electrical parameters and output them, and the N6 second PD networks included in any one of the first PDs are used to convert the received light energy into N6 sixth electrical parameters and output them. The first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays and the N6 sixth electrical parameters output by the N6 second PD networks included in any one of the first PD arrays.

22. The optical receiver according to claim 17 or 18, characterized in that Any of the first PD arrays also includes N7 third PD networks, and there is at least one first PD network between each of the N7 third PD networks and the center point of the light receiving area where the any of the first PD array is located. The number of PDs contained in each of the N7 third PD networks is greater than the first threshold, and all the PDs contained in each of the third PD networks are connected in series to form a zigzag line structure with an unfixed extension direction, and N7 is a positive integer greater than or equal to 1 and less than N5.

23. The optical receiver according to claim 22, characterized in that The N5 first PD networks included in any one of the N1 first PDs are used to convert the received light energy into N5 fifth electrical parameters, the N7 third PD networks included in any one of the first PD arrays are used to convert the received light energy into N7 seventh electrical parameters, and the first electrical parameter output by any one of the first PD arrays is obtained by superimposing the N5 fifth electrical parameters output by the N5 first PD networks included in any one of the first PD arrays and the N7 seventh electrical parameters output by the N7 third PD networks included in any one of the first PD arrays.

24. The optical receiver according to any one of claims 1 to 23, characterized in that: The optical receiver further includes an output control module, and the output control module is connected to the N1 first PD arrays respectively; In the case where the first signal light is incident on the optical receiver, the output control module is used to amplify the first electrical parameter output by each of the N1 first PD arrays to obtain N1 eighth electrical parameters; The output control module is further used to determine N2 target first PD arrays from the N1 first PD arrays based on the N1 eighth electrical parameters, and output the eighth electrical parameter corresponding to each target first PD array in the N2 target first PD arrays.

25. An optical receiver, characterized in that: The optical receiver comprises a signal processing module and an optical receiver as claimed in any one of claims 1 to 24, wherein the signal processing module is connected to the optical receiver; The optical receiver is used to receive the first signal light through N2 target first PD arrays among the N1 first PD arrays, and output N2 eighth electrical parameters, where N2 is a positive integer greater than or equal to 1 and less than N1; The signal processing module is used to process the N2 eighth electrical parameters to obtain the data to be transmitted carried by the first signal light.

26. The optical receiver according to claim 25, characterized in that The signal processing module includes an analog-to-digital converter and a digital signal processor; The analog-to-digital converter is used to perform analog-to-digital conversion on the N2 eighth electrical parameters to obtain N2 digital signals; The digital signal processor is used to process the N2 digital signals to obtain the data to be transmitted.

27. An optical communication system, characterized in that: The optical communication system comprises an optical transmitter and an optical receiver as claimed in claim 25 or 26.

28. A light receiving method, characterized in that: The light receiving method is applied to an optical receiver, which includes an optical receiver and a signal processing module. The optical receiver includes a light receiving surface and N1 first photodetector PD arrays arranged on the light receiving surface, wherein the light receiving surface includes N1 light receiving areas, and the N1 first PD arrays are respectively embedded in the N1 light receiving areas, each first PD array includes multiple PDs, and the shape of any light receiving area in the N1 light receiving areas is one of an axisymmetric curved surface quadrilateral, an axisymmetric curved surface pentagon, an axisymmetric curved surface hexagon, a circle or an ellipse, or the shape of any light receiving area is one of an axisymmetric quadrilateral, an axisymmetric pentagon, and an axisymmetric hexagon, or the shape of any light receiving area is one of a distorted axisymmetric quadrilateral or a distorted axisymmetric hexagon, and N1 is a positive integer greater than or equal to 2; The method comprises: When the first signal light reaches the light receiving surface, obtaining N2 eighth electrical parameters output by N2 target first PD arrays in the N1 first PD arrays on the light receiver, where N2 is a positive integer greater than or equal to 1 and less than N1; The signal processing module processes the N2 eighth electrical parameters to obtain the data to be transmitted carried by the first signal light.

29. The method according to claim 28, characterized in that The method further comprises: Sequentially acquiring an eighth electrical parameter output by each of the N1 first PD arrays; When it is determined that the value of the eighth electrical parameter output by any one of the N1 first PD arrays is equal to or greater than the preset electrical parameter value, the any one of the first PD arrays and the N2-1 first PD arrays surrounding the any one of the first PD arrays are determined as the N2 target first PD arrays.

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