Cable-free communication system based on photon integrated phased array

Abstract

The invention discloses a no-cable communication system based on a photon integrated phased array, and the system comprises a plurality of symmetrical double-end receiving and transmitting communication systems, a modulation and demodulation module in a local end emits a modulation optical signal, and the modulation optical signal passes through a light transmitting antenna of the local end for multi-beam transmission; the optical receiving antenna at the opposite end receives an optical signal transmitted by the local end; the corresponding optical fiber beam splitter performs energy splitting on the received optical signal, one part of light is used for bidirectional closed-loop tracking control, and the rest of light enters the corresponding modulation and demodulation module; the modulation-demodulation module at the opposite end emits a modulated optical signal, and the modulated optical signal passes through the optical emission antenna at the opposite end to perform multi-beam emission; and the optical receiving antenna of the home terminal receives the optical signal transmitted by the opposite terminal so as to establish a bidirectional full-duplex communication link. According to the invention, rapid and agile beam control and simultaneous multi-beam transceiving are realized, and the application requirements of near-field cableless multi-link parallel communication are met.

Description

Technical Field

[0001] This invention relates to the field of laser communication technology, and in particular to a cableless communication system based on a photonic integrated phased array. Background Technology

[0002] Photonic integrated phased arrays can generate an emitted beam with a phase distribution according to a certain pattern by controlling the external electric / thermal fields of each phase shifter, thereby achieving beam deflection in the far field and enabling beam scanning. They feature fast response speed, low control voltage, and large scanning angle. Furthermore, through array multiplexing and sub-aperture partitioning techniques, multi-beam control can be achieved, enabling multi-link parallel communication. In the event of a link interruption, communication loop protection can be quickly implemented through backup redundant links, ensuring real-time and continuous communication.

[0003] Since the wavelength tuning deflection angle is affected by the tunable wavelength range of the light source, the scanning angle of the photonic integrated phased array is constrained when the light source cannot achieve wide-band tuning. In recent years, due to advancements in technology and phase calibration algorithms, integrated optical waveguide phased arrays that rely entirely on phase tuning to achieve large-angle two-dimensional scanning have begun to emerge, showing promising prospects in near-field space optical communication and can be used for information exchange of massive amounts of data within and between satellite platforms.

[0004] Therefore, how to achieve bidirectional closed-loop tracking control based on photonic integrated phased arrays and build a full-duplex cableless communication system has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to propose a cableless communication system based on a photonic integrated phased array. Based on a two-dimensional phase-scanning photonic integrated phased array antenna, it achieves rapid and agile beam control and simultaneous multi-beam transmission and reception, meeting the application requirements of near-field cableless multi-link parallel communication and replacing traditional complex optical communication schemes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: A cableless communication system based on a photonic integrated phased array includes: multiple symmetrical double-ended transceiver communication systems; each of the symmetrical double-ended transceiver communication systems includes: The modulation and demodulation module includes a two-dimensional phase-scanning photonic integrated phased array transceiver antenna and an optical fiber beam splitter, wherein the transceiver antenna includes an optical transmitting antenna and an optical receiving antenna. In a series of symmetrical double-ended transceiver communication systems, one of the systems acts as the local end, while the others act as the peer ends. The modulation and demodulation module in this terminal emits a modulated optical signal, which is then transmitted through the optical transmitting antenna in this terminal in a multi-beam manner. The optical receiving antenna at the other end receives the optical signal transmitted at this end; The corresponding optical fiber beam splitter splits the received optical signal in energy, part of which is used for bidirectional closed-loop tracking control, and the remaining part enters the corresponding modem module; The modem module of the opposite end sends a modulated optical signal through the optical transmitting antenna of the opposite end for multi-beam transmission; The optical receiving antenna of the local end receives the optical signal transmitted by the opposite end to establish a bidirectional full-duplex communication link.

[0007] Optionally, the optical receiving antenna of the opposite end can sequentially or simultaneously receive the optical signal transmitted by the local end.

[0008] Optionally, the optical transmitting antenna of the opposite end can sequentially or simultaneously transmit the optical signal.

[0009] Optionally, each transceiving antenna of the two-dimensional phase-scan photonic integrated phased array includes a silicon-based adapter board, an optical coupler, an optical power distribution network, an optical phase shifter array, and an optical antenna array arranged on the silicon-based adapter board respectively; The optical coupler is used to couple the modulated optical signal emitted by the modem module to the on-chip waveguide structure and output; The optical power distribution network is used to multi-array beam split the optical signal in the on-chip waveguide structure to obtain sub-array optical beam signals and output; The optical phase shifter array is used to phase control each sub-array optical beam signal; The optical antenna array is used to transmit the phase-controlled sub-array optical beam signal.

[0010] Optionally, each transceiving antenna of the two-dimensional phase-scan photonic integrated phased array further includes an electrical driving chip directly flip-chip mounted on the pads of the silicon-based adapter board and connected with the optical phase shifter array to realize the interconnection and intercommunication of driving signals.

[0011] Optionally, each symmetric double-ended transceiving communication system includes an energy detection sensor for energy detection of the optical power of the received optical signal while combining the phase shift value of the optical phase shifter array to synthesize feedback angle information for bidirectional closed-loop tracking control.

[0012] Optionally, all the two-dimensional phase-scan photonic integrated phased array transceiving antennas are integrated on the same chip.

[0013] Optionally, the two-dimensional phase-scan photonic integrated phased array transceiving antenna realizes multi-beam transceiving of optical signals by array multiplexing and / or sub-aperture method.

[0014] Optionally, each symmetric double-ended transceiving communication system is optoelectronically integrated on the same chip.

[0015] Compared with the prior art, the present application has at least one of the following technical effects: The present application constructs a cable-free communication system based on a photonic integrated phased array, which is different from the traditional optical antenna, realizes closed-loop bidirectional tracking based on energy splitting detection, has the characteristics of rapid chain building and multi-link parallel communication, and is suitable for large-scale popularization and application in the field of near-field optical communication.

[0016] The system can be monolithically optoelectronically integrated through a silicon-based optoelectronic and complementary metal oxide semiconductor compatible process, realize the chipping of the cable-free communication system, and get rid of the physical limitations of traditional cables and layouts.

[0017] The system has important application prospects in the fields of space laser communication and laser radar detection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A cable-free communication system scheme based on a photonic integrated phased array is provided for an embodiment of the present application; Figure 2 A composition diagram of a two-dimensional phase scanning photonic integrated phased array antenna is provided for an embodiment of the present application; Figure 3 A connection relationship diagram of an optical phase shifter array and an optical antenna array is provided for an embodiment of the present application; Figure 4 A cable-free communication system application example diagram based on a photonic integrated phased array 1-to-2 is provided. DETAILED DESCRIPTION

[0019] The cable-free communication system based on a photonic integrated phased array provided by the present application will be further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the present application will be clearer according to the following description. It should be noted that the drawings are greatly simplified and all use non-precise proportions, only to facilitate, clearly assist in explaining the purpose of the embodiments of the present application. In order to make the purpose, features and advantages of the present application more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limited conditions of the implementation of the present application, therefore, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be produced by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0020] As shown in Figure 1 The present embodiment provides a cable-free communication system based on a photonic integrated phased array, which includes a plurality of symmetric double-ended transceiver communication systems (1~N ends, N≥2).

[0021] Each of the symmetrical two-end transceiving communication systems comprises: a modulation and demodulation module 11~n1, a two-dimensional phase-scan photonic integrated phased array transceiving antenna and a fiber beam splitter 14~n4, wherein the transceiving antenna comprises a light transmitting antenna 12~n2 and a light receiving antenna 13~n3.

[0022] One of the plurality of symmetrical two-end transceiving communication systems is a home end for communication, and the others are opposite ends. The modulation and demodulation module in the home end sends a modulated light signal through the light transmitting antenna in the home end for multi-beam transmission.

[0023] The light receiving antenna in the opposite end receives the light signal transmitted by the home end.

[0024] The corresponding fiber beam splitter splits the received light signal in energy, part of which is used for bidirectional closed-loop tracking control, and the remaining part enters the corresponding modulation and demodulation module.

[0025] The modulation and demodulation module in the opposite end sends a modulated light signal through the light transmitting antenna in the opposite end for multi-beam transmission.

[0026] The light receiving antenna in the home end receives the light signal transmitted by the opposite end, which enters the modulation and demodulation module in the home end through the fiber beam splitter in the home end, so as to establish a bidirectional full-duplex communication link.

[0027] The embodiment is based on the two-dimensional phase-scan photonic integrated phased array transceiving antenna, realizes fast and agile beam control and simultaneous multi-beam transceiving, meets the application requirements of near-field cableless multi-link parallel communication, and replaces the traditional complex optical communication scheme.

[0028] In an embodiment, the light receiving antenna in the opposite end can receive the light signal transmitted by the home end sequentially or simultaneously.

[0029] In an embodiment, the light transmitting antenna in the opposite end can transmit the light signal sequentially or simultaneously.

[0030] As an example, the energy of the light signal used for bidirectional closed-loop tracking control is not greater than 10% of the total energy of the light signal, but the present application is not limited thereto.

[0031] In an embodiment, as shown in Figure 2 Each of the two-dimensional phase-scan photonic integrated phased array transceiving antennas comprises a silicon-based adapter board 1, a light coupler 2, an optical power distribution network 3, an optical phase shifter array 4 and an optical antenna array 5 arranged on the silicon-based adapter board 1, respectively.

[0032] The optical coupler 2 is used to couple the modulated optical signal output by the modem module into the on-chip waveguide structure (it can be understood that the two-dimensional phase scanning photonic integrated phased array belongs to the on-chip waveguide structure), and sequentially transmit it backward.

[0033] The optical power distribution network 3 includes a plurality of cascaded 1 2 couplers 1~M, which are used to perform multi-array beam splitting on the optical signal in the above-mentioned on-chip waveguide structure, obtain sub-array optical beam signals, and output them.

[0034] The optical phase shifter array 4 is used to perform phase control on each sub-array optical beam signal cascaded and split out, and the phase-controlled optical beam signals of each array are emitted into the free space by the optical antenna array 5 of the rear stage, so as to finally achieve the effect of phased optical field radiation; the optical phase shifter array 4 includes a plurality of phase shifters.

[0035] The optical antenna array 5 can be used as a transmitting antenna unit or a receiving antenna unit, and the transmitting and receiving light paths are reversible.

[0036] In an embodiment, please continue to refer to Figure 2 As shown in the figure, the transceiving antenna of each two-dimensional phase scanning photonic integrated phased array further includes an electrically driven chip 6 directly flip-chip mounted on the pad of the silicon-based adapter board 1, connected with the optical phase shifter array 4, and realizing the interconnection and intercommunication of the driving signal.

[0037] The electrically driven chip 6 is also used to apply different driving signals to each individual phase modulator in the optical phase shifter array 4, so as to realize the phase deflection of the output optical field signal at different angles. That is, to deflect the sub-array optical beam signal with different phase shifts.

[0038] In an embodiment, each symmetric double-ended transceiving communication system includes an energy detection sensor 15~n5, which is used to detect the energy of the received optical signal and simultaneously feed back the angle information combined with the phase shift value of the optical phase shifter array 4, and perform bidirectional closed-loop tracking control. Specifically, the size change of the detected energy is fed back in real time during the process of changing the phase shift value, and through the trend and magnitude of the energy change, the maximum value of the evaluation function (it can be understood that the evaluation function is stored in an external closed-loop control system, such as a host computer or a control chip) is gradually converged.

[0039] The cable-free communication system based on the photonic integrated phased array provided in the embodiment is different from the traditional optical antenna, and does not have a built-in optical camera as an angle error recognition and feedback mechanism, and can only perform energy detection on the optical power of the received optical signal through the high-sensitivity intensity detector 15-n5 integrated by beam splitting, and comprehensively feedback angle information in combination with the phase shift values of the optical phase shifter array 4 (the phase shift values of the optical phase shifter array 4 are preset in advance through phase calibration, and each outgoing beam deflection angle corresponds to a set of phase shift values of the optical phase shifter array), and perform bidirectional closed-loop tracking control, which is simple in structure and can resist sunlight interference.

[0040] In an embodiment, all the two-dimensional phase scanning photonic integrated phased array transceiver antennas are integrated on the same chip to ensure the coaxiality and isolation of the transceiver signals.

[0041] In an embodiment, the two-dimensional phase scanning photonic integrated phased array transceiver antenna realizes multi-beam transceiving of optical signals by using array multiplexing and / or sub-aperture method.

[0042] As shown in the left part of FIG. 1, Figure 3 the array multiplexing method is to multiplex a single array element by multiple phase shifters (the phase shifter multiplexing single array element means that a single array element multiplexes multiple phase shifters, as shown in the left part of FIG. 2, the structure design of the phase shifters is the same, and only different deflection is realized by applying different driving signals.), which realizes independent generation of multiple beams by using beam deflection principle and utilizes the entire array aperture. Figure 3 As shown in the right part of FIG. 1, the entire optical antenna array 5 is divided into three parts, and each set of phase shift values corresponds to one part, and the entire array aperture cannot be utilized.

[0043] It can be understood that the entire array aperture means that the entire optical antenna array 5 can correspond to the same set of phase shift values during transmission. Figure 3 As shown in the right part of FIG. 1, the entire optical antenna array 5 is divided into three parts, and each set of phase shift values corresponds to one part, and the entire array aperture cannot be utilized.

[0044] Each transmitting antenna element corresponds to multiple optical phase shifter arrays 4 to control the phase shift deflection control amount (the phase shift deflection control amount is the number of corresponding phase shifters. The number of corresponding phase shifters is the number of beam.

[0045] As shown in the right part of FIG. 1, the sub-aperture method is a single-chip sub-aperture division generation method, which can reduce the single-beam aperture, but increase the flexibility of beam quantity, shape and interval control. Figure 3 The present application is not limited to the specific application examples described above. The present application can be extended to any new features disclosed in the specification or any new combination. The specific process of the sub-aperture method is as shown in FIG. 3. Figure 3As shown in the middle-right diagram, the entire optical antenna array 5 is divided into three parts (which can transmit three beams individually, or receive three beams individually, or transmit two beams and receive one beam, and the number of beam transmission and reception can be defined independently according to application requirements), and each part corresponds to a set of phase shift deflection control quantities (θ1, θ2, θ3) ), which controls the transmission direction of the corresponding beam, and finally forms the transmission of three beams at the same time.

[0046] In an embodiment, the symmetric dual-end transceiving communication system is optoelectronic integrated on the same chip to realize the chipping of the entire communication system.

[0047] In order to facilitate understanding of the above embodiment, a specific example is described below: As Figure 4 shown, it is an application example of a 1-to-2 cableless communication system based on photonic integrated phased array.

[0048] Among them, the symmetric dual-end transceiving communication system 1 end is as the local end, and the symmetric dual-end transceiving communication systems 2 and 3 ends are as the opposite ends.

[0049] Firstly, the modulation and demodulation module 11 of the local end sends the modulated light signal through the optical transmitting antenna 12 of the local end for double-beam transmission, and the optical receiving antenna 23 and the optical receiving antenna 33 of the opposite end can receive the transmitted light signal in turn or simultaneously, and the received light signal is first subjected to energy splitting by the optical fiber beam splitter 24 and the optical fiber beam splitter 34 of the opposite end, a small part of light (<10%) is split for bidirectional closed-loop tracking control, and the remaining main energy enters the corresponding modulation and demodulation module 21 and the modulation and demodulation module 31 of the opposite end.

[0050] Conversely, the optical transmitting antenna 22 to the optical transmitting antenna 32 of the opposite end can transmit the modulated light signal (it can be understood that the modulated light signal is also sent by the modulation and demodulation module 21 and 31 of the opposite end, and the wavelengths of the modulated light signals of the two ends can be inconsistent, but the modulation formats are consistent.) to the optical receiving antenna 13 of the local end, which enters the modulation and demodulation module 11 of the local end through the optical fiber beam splitter 14 of the local end, thereby establishing a bidirectional full-duplex communication link between the 1 end and the 2 end and the 3 end.

[0051] The two-dimensional phase scanning photonic integrated phased array transceiving antenna (12, 13) multi-beam generation method mainly includes array multiplexing method and sub-aperture method.

[0052] In this embodiment, the high-sensitivity intensity detectors 15, 25 and 35 integrated by beam splitting perform energy detection on the received light power, and at the same time, the phase shifter 3 phase shift value comprehensive feedback angle information is combined to perform bidirectional closed-loop tracking control.

[0053] The two-way closed loop tracking control process: changing the phase shift value observation in the light receiving antennas 23 and 33 correspond to the energy detector 25 and 35 received light power energy change trend, according to the trend and magnitude of energy change, gradually converging to the maximum value of the evaluation function. Similarly, the modulated light signal emitted by the end light emitting antennas 22 and 32 is coupled into the energy detector 15 through the light receiving antenna 13, and gradually converges to the maximum value of the evaluation function through the trend and magnitude of energy change, thus the two-way energy reaches the optimal at the same time, which establishes the whole process of two-way closed loop tracking control.

[0054] It should be noted that the relational terms herein such as first and second and the like can merely be used to differentiate one entity or action from another, without necessarily requiring or implying that there are any such actual relationship or order between or among these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0055] It should be noted that the apparatus and method disclosed in the embodiments herein can also be implemented in other ways. The apparatus embodiments described above are only illustrative, for example, the flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the apparatus, method and computer program product according to the embodiments herein. In this regard, each block in the flowcharts or block diagrams can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders from those described in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0056] In addition, each functional module in each embodiment herein can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0057] Although the present application has been described in detail by the preferred embodiments, it should be recognized that the above description is not to be considered in a limiting sense. Many modifications and variations of the present application will be apparent to those skilled in the art upon reading the above description. Therefore, it is intended that all such modifications and variations come within the scope of the present application as defined by the appended claims.

Claims

1. A cableless communication system based on photonic integrated phased array, characterized in that, The application relates to a symmetric dual-end transceiving communication system. Each of the symmetric dual-end transceiving communication systems comprises: a modulation and demodulation module, a two-dimensional phase scanning photonic integrated phased array transceiving antenna and an optical fiber beam splitter, wherein the transceiving antenna comprises an optical transmitting antenna and an optical receiving antenna; one of the symmetric dual-end transceiving communication systems is a local end for communication, and the others are opposite ends; the modulation and demodulation module in the local end sends a modulated optical signal through the optical transmitting antenna in the local end to perform multi-beam emission; the optical receiving antenna in the opposite end receives the optical signal emitted by the local end; the corresponding optical fiber beam splitter splits the received optical signal to obtain part of the optical signal for bidirectional closed-loop tracking control and the remaining part of the optical signal into the corresponding modulation and demodulation module; the modulation and demodulation module in the opposite end sends a modulated optical signal through the optical transmitting antenna in the opposite end to perform multi-beam emission; the optical receiving antenna in the local end receives the optical signal emitted by the opposite end to establish a bidirectional full-duplex communication link. The optical receiving antenna in the opposite end can sequentially receive or simultaneously receive the optical signal emitted by the local end.

2. The photonic integrated phased array based cableless communication system of claim 1, wherein, The optical transmitting antenna in the opposite end can sequentially emit or simultaneously emit the optical signal.

3. The photonic integrated phased array based cableless communication system of claim 1, wherein, Each of the two-dimensional phase scanning photonic integrated phased array transceiving antennas comprises:

4. The photonic integrated phased array based cableless communication system of claim 1, wherein, a silicon-based adapter board, an optical coupler, an optical power distribution network, an optical phase shifter array and an optical antenna array arranged on the silicon-based adapter board respectively; the optical coupler is used for coupling the modulated optical signal sent by the modulation and demodulation module to an on-chip waveguide structure and outputting; the optical power distribution network is used for performing multi-array beam splitting on the optical signal in the on-chip waveguide structure to obtain sub-array optical beam signals and output; the optical phase shifter array is used for phase regulation on each sub-array optical beam signal; the optical antenna array is used for emitting the phase-regulated sub-array optical beam signal. Each of the two-dimensional phase scanning photonic integrated phased array transceiving antennas further comprises an electrical driving chip directly flip-chip mounted on a pad of the silicon-based adapter board and connected with the optical phase shifter array to realize interconnection and intercommunication of driving signals.

5. The photonic integrated phased array based cableless communication system of claim 4, wherein, Each of the symmetric dual-end transceiving communication systems comprises an energy detection sensor used for detecting the optical power of the received optical signal and combining the phase shift value of the optical phase shifter array to comprehensively feed back angle information to perform bidirectional closed-loop tracking control.

6. The photonic integrated phased array based cableless communication system of claim 5, wherein, All the two-dimensional phase scanning photonic integrated phased array transceiving antennas are integrated on the same chip.

7. The photonic integrated phased array based cableless communication system of claim 4, wherein, The two-dimensional phase scanning photonic integrated phased array transceiving antenna adopts an array multiplexing method and / or a sub-aperture method to realize multi-beam transceiving of the optical signal.

8. The photonic integrated phased array based cableless communication system of claim 4, wherein, Each of the symmetric dual-end transceiving communication systems is optoelectronically integrated on the same chip.

9. The photonic integrated phased array based cableless communication system of claim 1, wherein, ​

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