CN114785446B - Beam forming system based on array waveguide grating periodical output characteristics - Google Patents
Beam forming system based on array waveguide grating periodical output characteristics Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
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- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
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- H04B7/00—Radio transmission systems, i.e. using radiation field
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- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
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- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- H—ELECTRICITY
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- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
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- H04J14/0205—Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
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Abstract
The invention provides a beam forming system based on periodic output characteristics of an array waveguide grating, and relates to the technical field of photon integration. In the invention, each multi-channel adjustable delay module is used for beam combination and beam splitting of optical-load microwave signals in the module and overall delay control among the modules; each first array waveguide grating is used for combining beams; the multi-channel adjustable dispersion delay module is used for delay control among wave beam channels; the multi-channel detector module is used for recovering the antenna signals of each wave beam, namely corresponding to each direction. Utilizing the free spectrum region characteristic of the array waveguide grating to fully excavate spectrum resources; one direction dimension realizes the relative delay between different modules through the multi-channel adjustable delay module, and the other direction dimension realizes the relative delay between the internal channels of each module through optical fibers, thereby realizing the arrayed two-dimensional light-operated beam forming system by combining two delay modes.
Description
Technical Field
The invention relates to the technical field of photon integration, in particular to a beam forming system based on periodic output characteristics of an array waveguide grating.
Background
Compared with a mechanical scanning architecture, the light-operated beam forming system has various advantages, including rapid and flexible scanning without inertia, multiple beams, high reliability and the like, and has wide application value in the aspects of 5G communication, light-operated beam forming radar and the like. However, the conventional method of beam forming using a phase shifter to realize scanning cannot obtain a large instantaneous signal bandwidth due to the aperture effect. The problem of aperture effect can be avoided by shifting the phase between the channels by using a true delay line.
And the microwave photonics technology modulates the microwave signal onto the optical carrier signal, the photon technology such as optical fiber is utilized to realize true delay control, finally, the photoelectric detector is utilized to realize the recovery of the microwave signal with the delay control at the tail end, and finally, the light-operated beam forming system is realized.
The traditional light-operated real time delay system realized by utilizing optical fiber and other separation devices has a complex structure, the traditional wavelength division multiplexer with limited channel number limits the expansion of the channel number of the system, the existing light-operated time delay network system realized based on the silicon photon optical chip hardly fully plays the advantage of rich light wavelength resources, and greatly limits the expansion application of the light-operated beam forming system.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a beam forming system based on the periodical output characteristic of an array waveguide grating, which solves the technical problem that the light wavelength resource of the existing light-operated beam forming system cannot be effectively and fully utilized.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme:
A wave beam forming system based on the periodical output characteristic of an array waveguide grating comprises a plurality of multi-channel adjustable delay modules, a plurality of first array waveguide gratings, a multi-channel adjustable scattered delay module and a multi-channel detector module which are connected in sequence;
each multi-channel adjustable delay module is used for beam combination and beam splitting of optical-load microwave signals in the module and overall delay control among the modules, and each delayed beam is transmitted to the corresponding first array waveguide grating;
Each first array waveguide grating is used for combining beams and transmitting the beams to the multichannel tunable dispersion delay module;
The multi-channel tunable dispersion delay module is used for delay control among wave beam channels and transmitting the delay control to the multi-channel detector module;
the multi-channel detector module is used for recovering the antenna signals of each wave beam, namely corresponding to each direction.
Preferably, the number of the multi-channel adjustable delay modules and the number of the first array waveguide gratings are equal, and the number of the multi-channel adjustable delay modules and the number of the first array waveguide gratings are any number between 8 and 32.
Preferably, any one of the multi-channel adjustable delay modules comprises an antenna module, an electro-optical modulation module, a second arrayed waveguide grating, a beam splitter and a switch bit delay line chip which are connected in sequence;
The antenna module receives antenna signals and modulates the antenna signals onto an optical carrier through the electro-optical modulation modules, wherein the working wavelength of each electro-optical modulation module corresponds to the working wavelength of the first array waveguide grating and the interval wavelength of an adjacent free spectrum region;
and the second array waveguide grating receives the modulated light-carrying microwave signals to be combined, and the light-carrying microwave signals are divided into a plurality of beams by the beam splitter, wherein each beam comprises the light-carrying microwave signals corresponding to each antenna channel, and the overall delay of each beam is realized by the switch bit delay line chip.
Preferably, the electro-optic modulation module comprises a laser and a modulator; or the electro-optic modulation module comprises a direct modulation laser.
Preferably, the second arrayed waveguide grating comprises an on-chip integrated arrayed waveguide grating;
preferably, the beam splitter comprises an on-chip integrated optical beam splitter.
Preferably, any one of the first array waveguide gratings includes a single channel waveguide, a free transmission area, an array waveguide, a free transmission area and an 8-channel waveguide, which are sequentially connected, so as to realize the following wavelength selection:
The same group of output adjacent wavelengths have equal wavelength intervals, and the central wavelengths of the groups of outputs corresponding to the adjacent free propagation regions also have equal wavelength intervals; the wavelength is in the infrared band.
Preferably, the second arrayed waveguide grating is identical to the first arrayed waveguide grating structure.
Preferably, each channel architecture of the multi-channel tunable dispersion delay module is identical, wherein any channel architecture comprises a plurality of 2×2 optical switches and optical fibers with different dispersion lengths;
The 2X 2 optical switch is used for realizing the control of optical path switching; laser signals with the same wavelength interval pass through the optical fibers with different dispersion lengths, so that different delay control is realized.
Preferably, the switch bit delay line chip is identical to any one of the channel architectures.
Preferably, the on-chip integrated array waveguide grating, the on-chip integrated optical beam splitter and the switch bit delay line chip are manufactured by adopting a micro-nano processing flow sheet process, and the adopted materials comprise silicon on insulator, silicon dioxide, silicon nitride, III-V semiconductor materials or polymer materials.
(III) beneficial effects
The invention provides a beam forming system based on periodic output characteristics of an array waveguide grating. Compared with the prior art, the method has the following beneficial effects:
The invention comprises a plurality of multi-channel adjustable delay modules, a plurality of first array waveguide gratings, a multi-channel adjustable scattered delay module and a multi-channel detector module which are connected in sequence; each multi-channel adjustable delay module is used for beam combination and beam splitting of optical-load microwave signals in the module and overall delay control among the modules; each first array waveguide grating is used for combining beams; the multi-channel adjustable dispersion delay module is used for delay control among wave beam channels; the multi-channel detector module is used for recovering the antenna signals of each wave beam, namely corresponding to each direction. Utilizing the free spectrum region characteristic of the array waveguide grating to fully excavate spectrum resources; one direction dimension realizes the relative delay between different modules through the multi-channel adjustable delay module, and the other direction dimension realizes the relative delay between the internal channels of each module through optical fibers, thereby realizing the arrayed two-dimensional light-operated beam forming system by combining two delay modes.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a beam forming system based on periodic output characteristics of an array waveguide grating according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another beam forming system based on periodic output characteristics of an array waveguide grating according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a multi-channel adjustable delay module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a first array waveguide grating according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the wavelength relationship between the operation of an arrayed waveguide grating and each channel according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of a single channel architecture of a multi-channel tunable dispersion delay module according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the application solves the technical problem that the light wavelength resource of the existing light-operated beam forming system cannot be effectively and fully utilized by providing the beam forming system based on the periodical output characteristic of the array waveguide grating.
The technical scheme in the embodiment of the application aims to solve the technical problems, and the overall thought is as follows:
The embodiment of the invention fully excavates optical wavelength resources based on a free spectrum region mechanism of periodic wavelength output of the on-chip integrated array waveguide grating, and applies the characteristics of equal interval of the free spectrum region and equal interval of channel wavelength, thereby aiming at the problems that the optical wavelength resources of the existing system light-operated beam forming system cannot be effectively and fully utilized, simplifying the system architecture, realizing the multi-wavelength-based light-operated beam forming system, and relatively simplifying the device requirements and reducing the complexity compared with the existing light-operated beam forming system.
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
As shown in fig. 1, the application provides a beam forming system based on the periodical output characteristics of an array waveguide grating, which comprises a plurality of multi-channel adjustable delay modules 1, a plurality of first array waveguide gratings 2, a multi-channel adjustable dispersion delay module 3 and a multi-channel detector module 4 which are connected in sequence;
Each multi-channel adjustable delay module 1 is used for beam combination and beam splitting of optical-loaded microwave signals in the module and overall delay control among the modules, and transmits each delayed beam to the corresponding first array waveguide grating 2;
each first array waveguide grating 2 is used for combining beams and transmitting the beams to the multi-channel tunable dispersion delay module 3;
the multi-channel tunable dispersion delay module 3 is used for delay control among various wave beam channels and transmits the delay control to the multi-channel detector module 4;
the multi-channel detector module 4 is used for recovering the antenna signals of each beam, i.e. corresponding to each direction.
The application fully excavates spectrum resources by utilizing the characteristics of the free spectrum area of the array waveguide grating; one direction dimension realizes the relative delay between different modules through the multi-channel adjustable delay module, and the other direction dimension realizes the relative delay between the internal channels of each module through optical fibers, thereby realizing the arrayed two-dimensional light-operated beam forming system by combining two delay modes.
The number of the multi-channel adjustable delay modules 1 and the number of the first array waveguide gratings 2 are equal and are any number between 8 and 32, and specific application can be changed according to actual needs.
In the following, the present application will be described only with reference to the specific case where the number of the multi-channel tunable delay module 1 and the first arrayed waveguide grating 2 is 8, and the other cases can be referred to in the same way.
Example 1:
as shown in fig. 2, the application provides a beam forming system based on the periodic output characteristic of an arrayed waveguide grating, which comprises 8 multi-channel adjustable delay modules 1-1, 1-8 and 8 first arrayed waveguide gratings 2-1, 2-8, a multi-channel adjustable delay module 3 and a multi-channel detector module 4 which are connected in sequence;
each multi-channel adjustable delay module is used for beam combination and beam splitting of optical-load microwave signals in the module and overall delay control among the modules, and each delayed beam is transmitted to the corresponding first array waveguide grating;
Each first array waveguide grating is used for combining beams and transmitting the beams to the multichannel tunable dispersion delay module 3;
the multi-channel tunable dispersion delay module 3 is used for delay control among various wave beam channels and transmits the delay control to the multi-channel detector module 4;
the multi-channel detector module 4 is used for recovering the antenna signals of each beam, i.e. corresponding to each direction.
The relative delay among the multi-channel adjustable delay modules, namely the overall delay of a corresponding system in one direction dimension, is realized through the multi-channel adjustable delay modules 1-1 to 1-8; the relative delay among the channels of each module, namely the integral delay corresponding to the other direction dimension of the system, is realized through the multichannel adjustable dispersion delay module 3 and the wavelength interval difference of each channel.
Specifically, any multi-channel adjustable delay module comprises an antenna module 11, an electro-optical modulation module 12, a second arrayed waveguide grating 13, a beam splitter 14 and a switch bit delay line chip 15 which are connected in sequence;
the antenna module 11 receives the antenna signal and modulates the antenna signal onto an optical carrier through the electro-optical modulation modules 12, wherein the working wavelength of each electro-optical modulation module 12 corresponds to the working wavelength of the first array waveguide grating 2 and the interval wavelength of the adjacent free spectrum region;
The second arrayed waveguide grating 13 receives the modulated optical carrier microwave signals for beam combination, and is divided into a plurality of beams by the beam splitter 14, wherein each beam comprises the optical carrier microwave signals corresponding to each antenna channel, and further the overall delay of each beam is realized by the switch bit delay line chip 15, namely, the relative delay between each module corresponding to the multi-channel adjustable delay modules 1-1 to 1-8 in fig. 2 is realized.
As shown in fig. 3, the inter-module delayed optical carrier microwave signals implemented by each multi-channel delay module are transmitted to the module array waveguide grating modules 2-1 to 2-8 shown in fig. 2, wherein the output channels 1-8 corresponding to each module 1-1 to 1-8 are respectively connected with the 1-8 input channels corresponding to each module 2-1 to 2-8, so as to realize beam combination of each beam; then transmitting the combined signals to a multi-channel adjustable delay module 1 to realize delay control among all antenna channels; finally, the recovery of each wave beam, namely the antenna signal corresponding to each direction, is realized through the multichannel detector module 4.
The electro-optic modulation module 12 includes a laser and a modulator; or the electro-optic modulation module 12 may comprise a direct modulation laser. The working wavelength corresponds to the output of each channel in each free propagation group of the first array waveguide grating, and the specific description of the wavelength is as follows in connection with fig. 5: the plurality of lasers of module 1-1 of fig. 1 each correspond to 1-1-1, 1-1-2..1-1-8 of fig. 5, respectively, the plurality of lasers of module 1-2 each correspond to 1-2-1, 1-2..1-2-8 of fig. 5, by analogy, the laser wavelengths of the multiple lasers of modules 1-8 correspond to 1-8-1, 1-8-2..1-8-8, respectively, in fig. 5.
The second arrayed waveguide grating 13 comprises an on-chip integrated arrayed waveguide grating; the second arrayed waveguide grating 13 may have the same structure as the first arrayed waveguide grating 2.
The beam splitter 14 comprises an on-chip integrated optical beam splitter that is capable of splitting an input broad spectrum signal equally into a plurality of equal parts of optical signals to achieve a multi-beam output, in this embodiment a 1 x 8 split, as shown in fig. 2.
Specifically, as shown in fig. 4, any of the first arrayed waveguide gratings 2 includes a single channel waveguide 21, a free transmission area 22, an arrayed waveguide 23, a free transmission area 24, and an 8-channel waveguide 25, which are sequentially connected, and by appropriate parameter design and material system selection, optical wavelength selection as shown in fig. 5 can be implemented:
The same group of output adjacent wavelengths have equal wavelength intervals, and the central wavelengths of the groups of outputs corresponding to the adjacent free propagation regions also have equal wavelength intervals; the wavelength is in the infrared band. For the development, the following steps are taken: 1-1-1 to 1-1-8 correspond to the wavelength output schematic diagrams of 8 channels of the array waveguide grating, the wavelength intervals are equal intervals, 1-2-1 to 1-2-8 correspond to the wavelength output schematic diagrams of the next period of the array waveguide grating, the corresponding wavelength intervals are equal intervals and are separated from the wavelength output of the first period by one period, and the corresponding period is determined by the structural parameter design of the array waveguide grating; the wavelength is in the infrared band.
Specifically, as shown in fig. 6, the channel architectures of the multi-channel tunable dispersion delay module 3 are identical, wherein any channel architecture includes a plurality of 2×2 optical switches and optical fibers with different dispersion lengths;
The 2X 2 optical switch is used for realizing the control of optical path switching; laser signals with the same wavelength interval pass through the optical fibers with different dispersion lengths, so that different delay control is realized. In the development, 51-56 correspond to 2X 2 optical switches respectively, so as to realize the light path switching control; 57-511 respectively correspond to different dispersion optical fiber lengths, and laser signals with the same wavelength interval pass through the optical fibers with different dispersion lengths so as to realize different time delays. In the implementation of the invention, a 5-bit adjustable delay module is adopted, and the specific application can be changed according to actual needs.
In particular, the above-mentioned switch bit delay line chip 15 is identical to any channel architecture of the multi-channel tunable dispersion delay module 3.
The switch bit delay line chip 15, the specific adjustable delay line architecture may also be as shown in fig. 5, where 51-56 represent 2×2 optical switches, and 57-510 represent single-mode waveguides with different lengths, so as to implement true delays in different states; the adjustable delay line module in fig. 2 is implemented by 8 adjustable delay lines of the same architecture.
In the embodiment of the invention, the on-chip integrated array waveguide grating, the on-chip integrated optical beam splitter and the switch bit delay line chip 15 are manufactured by adopting a micro-nano processing flow sheet process, and the adopted materials comprise silicon on insulator, silicon dioxide, silicon nitride, III-V semiconductor materials or polymer materials.
As can be seen from the above description, in the embodiment of the present invention, the first arrayed waveguide grating and the second arrayed waveguide grating may be identical, and the multi-channel tunable dispersion delay module and the open-optical bit delay line chip may be identical, so that the cost of the chip and the preparation cost are greatly reduced, and the complexity of the system is reduced. Therefore, the arrayed two-dimensional beam forming system realized by the invention has the advantages of simple structure, small volume weight cost, high wavelength resource utilization rate and the like.
In summary, compared with the prior art, the method has the following beneficial effects:
1. The embodiment of the invention fully excavates spectrum resources by utilizing the characteristics of the free spectrum area of the array waveguide grating; one direction dimension realizes the relative delay between different modules through the multi-channel adjustable delay module, and the other direction dimension realizes the relative delay between the internal channels of each module through optical fibers, thereby realizing the arrayed two-dimensional light-operated beam forming system by combining two delay modes.
2. In the embodiment of the invention, the first array waveguide grating and the second array waveguide grating can be identical, the multichannel tunable dispersion delay module and the light-on bit delay line chip can be identical, so that the cost of a flow sheet and the preparation cost are greatly reduced, and the complexity of a system is reduced. Therefore, the arrayed two-dimensional beam forming system realized by the invention has the advantages of simple structure, small volume weight cost, high wavelength resource utilization rate and the like.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The beam forming system based on the periodical output characteristics of the array waveguide grating is characterized by comprising a plurality of multi-channel adjustable delay modules (1), a plurality of first array waveguide gratings (2), a multi-channel adjustable dispersion delay module (3) and a multi-channel detector module (4) which are connected in sequence;
Each multi-channel adjustable delay module (1) is used for beam combination and beam splitting of optical-loaded microwave signals in the module and overall delay control among the modules, and each delayed beam is transmitted to the corresponding first array waveguide grating (2);
Each first array waveguide grating (2) is used for combining beams and transmitting the beams to the multichannel tunable dispersion delay module (3);
The multi-channel adjustable scattered delay module (3) is used for delay control among wave beam channels and transmits the delay control to the multi-channel detector module (4);
The multichannel detector module (4) is used for recovering each wave beam, namely the antenna signal corresponding to each direction;
Any multichannel adjustable delay module (1) comprises an antenna module (11), an electro-optical modulation module (12), a second arrayed waveguide grating (13), a beam splitter (14) and a switch bit delay line chip (15) which are connected in sequence;
The antenna module (11) receives antenna signals and modulates the antenna signals onto an optical carrier through the electro-optical modulation modules (12), wherein the working wavelength of each electro-optical modulation module (12) corresponds to the working wavelength of the first array waveguide grating (2) and the interval wavelength of adjacent free spectral regions;
The second arrayed waveguide grating (13) receives the modulated light-carrying microwave signals to combine beams, the light-carrying microwave signals are divided into a plurality of beams by the beam splitter (14), each beam comprises the light-carrying microwave signals corresponding to each antenna channel, and then the whole delay of each beam is realized by the switch bit delay line chip (15).
2. A beamforming system according to claim 1, wherein the number of the multi-channel tunable delay module (1) and the first array waveguide grating (2) are equal and are any number between 8 and 32.
3. The beam forming system according to claim 1, wherein the electro-optic modulation module (12) comprises a laser and a modulator; or the electro-optic modulation module (12) comprises a direct-tuning laser.
4. The beamforming system of claim 1, wherein,
The second arrayed waveguide grating (13) comprises an on-chip integrated arrayed waveguide grating; and/or the beam splitter (14) comprises an on-chip integrated optical beam splitter.
5. A beam forming system according to claim 1, characterized in that any one of the first array waveguide gratings (2) comprises a single channel waveguide (21), a free transmission region (22), an array waveguide (23), a free transmission region (24) and an 8-channel waveguide (25) connected in sequence, enabling the following wavelength selection:
The same group of output adjacent wavelengths have equal wavelength intervals, and the central wavelengths of the groups of outputs corresponding to the adjacent free propagation regions also have equal wavelength intervals; the wavelength is in the infrared band.
6. The beam forming system according to claim 5, characterized in that the second arrayed waveguide grating (13) is identical in structure to the first arrayed waveguide grating (2).
7. The beam forming system according to claim 1, characterized in that the channel architectures of the multi-channel tunable dispersion delay module (3) are identical, wherein any channel architecture comprises several 2x 2 optical switches and optical fibers of different dispersion lengths;
The 2X 2 optical switch is used for realizing the control of optical path switching; laser signals with the same wavelength interval pass through the optical fibers with different dispersion lengths, so that different delay control is realized.
8. The beam forming system according to claim 7, wherein the switch bit delay line chip (15) is identical to any of the channel architectures.
9. The beamforming system of claim 4, wherein,
The on-chip integrated array waveguide grating, the on-chip integrated optical beam splitter and the switch bit delay line chip (15) are manufactured by adopting a micro-nano processing flow sheet process, and the adopted materials comprise silicon on insulator, silicon dioxide, silicon nitride, III-V semiconductor materials or polymer materials.
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