Light-operated true delay network and method based on wavelength-time interleaving switching

Abstract

The invention particularly relates to a light-operated true delay network and method based on wavelength-time interleaving switching, and the network comprises a multi-wavelength signal generation module which is used for generating multiple paths of optical signals with different wavelengths, and modulating the optical signals into multi-wavelength optical signals to be subjected to delay regulation; the wavelength-time interleaving optical true delay line module is used for carrying out multi-wavelength signal switching on the multi-wavelength optical signal to be subjected to delay regulation and control according to a preset wavelength-time interleaving sequence based on the received control signal to generate a plurality of single-wavelength signals after true delay regulation and control, a true delay regulation and control signal with a target delay amount is output from the plurality of single-wavelength signals in a routing manner based on the control signal; and the photoelectric conversion module is used for converting the target true delay signal into a radio frequency signal and outputting the radio frequency signal. Therefore, the problem that communication signals are damaged due to the fact that the switching speed of the true delay amount of the optical signals is low in the prior art is solved, and high-frequency broadband true delay regulation and control which are fast in switching, low in loss and resistant to electromagnetic interference are achieved.

Description

Technical Field

[0001] This application relates to the technical field of optical beamforming, and particularly relates to an optical true-time-delay network and method based on wavelength-time interleaved switching. Background Art

[0002] Beamforming is a core technology for next-generation broadband wireless communication and smart antennas. It controls the phase difference of each microwave link in the array, so that the radiation fields of each microwave radiation source generate constructive interference in a specific direction in the far field, achieving the purpose of directional transmission or reception. The traditional analog beamforming technology is implemented using phase shifters integrated with each antenna array, which has the bottleneck of "beam squint" and cannot meet the application requirements of broadband communication. The optical true-time-delay network uses low-loss optical media (such as optical fibers and optical waveguides) to implement signal delay, introducing a true time delay independent of frequency between each antenna array. In addition to solving the beam squint problem of broadband phased array systems, it also has the advantages of small size, light weight, electromagnetic interference resistance, large bandwidth, and no beam tilt. The optical true-time-delay network has become an important implementation method and research hotspot of beamforming technology.

[0003] In related technologies, the main implementation paths of the optical true-time-delay network are based on dispersive delay lines, optical path switching delay lines, and wavelength selection delay lines. The scheme based on dispersive delay lines achieves adjustable true time delay by changing the dispersion experienced by light during transmission. It usually adopts the form of tuning the dispersion amount of the tuning device or tuning the signal wavelength, can be continuously tuned, and realizes a high delay resolution. The scheme based on optical path switching delay lines usually realizes delay increment tuning by cascading optical switches and different lengths of optical delays, and has the advantages of high frequency, large bandwidth, large adjustable true time delay range, and good scalability. Generally, thermo-optic and magneto-optic switches are used, which have good extinction ratio, low insertion loss, and small volume. The scheme based on wavelength selection delay lines is based on wavelength division multiplexing and wavelength selective switches, and routing different wavelength optical signals to different paths can realize different true time delay amounts;

[0004] However, the scheme based on dispersive delay lines is limited by the dispersion effect, and the adjustable delay amount and signal bandwidth restrict each other; the scheme based on optical path switching delay lines is restricted by physical principles such as thermo-optic effect and magneto-optic effect, and the switching time is long. The electro-optic switch based on the free carrier dispersion effect has large insertion loss and poor extinction ratio, and multi-stage cascading will cause the accumulation of signal power loss and crosstalk, making it difficult to play the role of cascading and switching; in the scheme based on wavelength selection delay lines, the discrete switch realizes wavelength routing through mechanical adjustment, with large insertion loss and slow switching speed; the tuning of the integrated wavelength selective switch is usually based on thermo-optic effect or electro-optic effect, with slow response time, small tuning range, and large loss, which urgently needs to be solved. Summary of the Invention

[0005] The present application provides an optical-controlled true time delay network and method based on wavelength-time interleaved switching, which solves problems such as slow switching speed of the true time delay amount of optical signals and communication signal damage in related technologies, and realizes high-frequency broadband true time delay regulation with fast switching, low loss, and anti-electromagnetic interference.

[0006] According to an embodiment of the first aspect of the present application, an optical-controlled true time delay network based on wavelength-time interleaved switching is provided, including:

[0007] A multi-wavelength signal generation module, configured to generate multiple optical signals with different wavelengths, and modulate the multiple optical signals with different wavelengths into multi-wavelength optical signals to be subjected to time delay regulation;

[0008] A wavelength-time interleaved optical true time delay line module, configured to perform multi-wavelength signal switching on the multi-wavelength optical signals to be subjected to time delay regulation in a preset wavelength-time interleaved order based on a received control signal, generate multiple single-wavelength signals after true time delay regulation, and select and output a true time delay regulation signal with a target time delay amount from the multiple single-wavelength signals based on the control signal;

[0009] An optoelectronic conversion module, configured to convert the target true time delay signal into a radio frequency signal and output the radio frequency signal.

[0010] Optionally, the multi-wavelength signal generation module includes: a multi-wavelength light source array, a wavelength multiplexer, and an electro-optic modulator; wherein,

[0011] The multi-wavelength light source array is configured to generate the multiple optical signals with different wavelengths;

[0012] The wavelength multiplexer is configured to combine the multiple optical signals with different wavelengths to obtain a multi-wavelength light source signal;

[0013] The electro-optic modulator is configured to mix a preset radio frequency domain communication signal with the multi-wavelength light source signal to generate the multi-wavelength optical signals to be subjected to time delay regulation.

[0014] Optionally, the optical-controlled true time delay network based on wavelength-time interleaved switching further includes:

[0015] A control module, configured to generate the control signal.

[0016] Optionally, the wavelength-time interleaved optical true time delay line module includes: a wavelength division multiplexing optical true time delay array and a high-speed routing switch, wherein,

[0017] Both the wavelength division multiplexing optical true time delay array and the high-speed routing switch are connected to the control module, the output end of the wavelength division multiplexing optical true time delay array is connected to the input end of the high-speed routing switch, and the output end of the high-speed routing switch is connected to the optoelectronic conversion module;

[0018] The wavelength-division multiplexed optical true-time-delay array is configured to route the multi-wavelength optical signals to be time-delay adjusted to different optical time-delay paths according to a preset wavelength interleaving order based on the control signal, so as to obtain multiple single-wavelength signals after true-time-delay adjustment;

[0019] The high-speed routing switch is configured to route and determine the true-time-delay control signal with a target time-delay amount from the multiple single-wavelength signals after true-time-delay adjustment based on the control signal.

[0020] Optionally, the wavelength-division multiplexed optical true-time-delay array further includes: cascaded multi-stage wavelength selective switches and optical time-delay paths, where,

[0021] The multi-stage wavelength selective switch is a microring resonator.

[0022] Optionally, the high-speed routing switch is an electro-optic switch, and the optoelectronic conversion module is an optoelectronic detector.

[0023] An embodiment of the second aspect of the present application provides an optical control true-time-delay method based on wavelength-time interleaving switching. The optical control true-time-delay method based on wavelength-time interleaving switching uses the optical control true-time-delay network shown in the embodiment of the first aspect. Wherein, the method includes the following steps:

[0024] Generate multiple optical signals with different wavelengths through the multi-wavelength signal generation module, and modulate the multiple optical signals with different wavelengths into multi-wavelength optical signals to be time-delay adjusted;

[0025] Through the wavelength-time interleaved optical true-time-delay line module, based on the received control signal, perform multi-wavelength signal switching on the multi-wavelength optical signals to be time-delay adjusted according to a preset wavelength-time interleaving order, generate multiple single-wavelength signals after true-time-delay adjustment, and route and output a true-time-delay control signal with a target time-delay amount from the multiple single-wavelength signals after true-time-delay adjustment based on the control signal;

[0026] Convert the true-time-delay control signal with a target time-delay amount into a radio frequency signal through the optoelectronic conversion module, and output the radio frequency signal.

[0027] Optionally, the step of generating multiple optical signals with different wavelengths through the multi-wavelength signal generation module and modulating the multiple optical signals with different wavelengths into multi-wavelength optical signals to be time-delay adjusted includes:

[0028] Generate the multiple optical signals with different wavelengths through a multi-wavelength light source array;

[0029] Use a wavelength multiplexer to combine the multiple optical signals with different wavelengths to obtain a multi-wavelength light source signal;

[0030] Mix the preset radio frequency domain communication signal with the multi-wavelength light source signal through an electro-optic modulator to generate the multi-wavelength optical signal to be delay-regulated.

[0031] Optionally, the wavelength-time interleaved optical true delay line module performs multi-wavelength signal switching on the multi-wavelength optical signal to be delay-regulated according to a preset wavelength-time interleaved order based on the received control signal, generates the true delay amounts of multiple single-wavelength signals, and outputs the delay amount of the true delay regulation signal from the true delay amounts of the multiple single-wavelength signals based on the control signal. It further includes:

[0032] Generate the control signal through the control module.

[0033] Optionally, the wavelength-time interleaved optical true delay line module performs multi-wavelength signal switching on the multi-wavelength optical signal to be delay-regulated according to a preset wavelength-time interleaved order based on the received control signal, generates the true delay amounts of multiple single-wavelength signals, and outputs the delay amount of the true delay regulation signal from the true delay amounts of the multiple single-wavelength signals, including:

[0034] Route the multi-wavelength optical signal to be delay-regulated to different optical delay paths according to a preset wavelength interleaved order through a wavelength division multiplexing optical true delay array based on the control signal to obtain multiple single-wavelength signals after true delay regulation;

[0035] The high-speed routing switch is used to route and determine the true delay regulation signal with the target delay amount from the multiple single-wavelength signals after true delay regulation based on the control signal.

[0036] Optionally, the wavelength-time interleaved optical true delay line module performs multi-wavelength signal switching on the multi-wavelength optical signal to be delay-regulated according to a preset wavelength-time interleaved order based on the received control signal, generates the true delay amounts of multiple single-wavelength signals, and outputs the delay amount of the true delay regulation signal from the true delay amounts of the multiple single-wavelength signals. It further includes: cascaded multi-stage wavelength selective switches and optical delay paths, where,

[0037] The multi-stage wavelength selective switch is a micro-ring resonator.

[0038] Optionally, the high-speed routing switch is an electro-optic switch, and the optoelectronic conversion module is an optoelectronic detector.

[0039] Accordingly, in the embodiments of the present application, a multi-wavelength signal generation module generates multiple optical signals with different wavelengths and modulates them into multi-wavelength optical signals to be delay-regulated. The wavelength-time interleaved optical true delay line module performs multi-wavelength signal switching on the multi-wavelength optical signals to be delay-regulated according to the received control signal in a preset wavelength-time interleaved order, generates true delay amounts of multiple single-wavelength signals, and outputs the delay amount of the true delay regulation signal from the true delay amounts of the multiple single-wavelength signals based on the control signal. The photoelectric conversion module converts the target true delay amount into a radio frequency signal and outputs the radio frequency signal. Accordingly, the problem in the related art that the slow switching speed of the true delay amount of the optical signal causes damage to the communication signal is solved, and high-frequency broadband true delay regulation with fast switching, low loss, and anti-electromagnetic interference is realized.

[0040] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0042] Figure 1 is a block diagram of an optical-controlled true delay network based on wavelength-time interleaved switching according to an embodiment of the present application;

[0043] Figure 2 is a schematic structural diagram of an implementation method of an optical-controlled true delay network based on wavelength-time interleaved switching according to an embodiment of the present application;

[0044] Figure 3 is a schematic principle diagram of an optical-controlled true delay network based on wavelength-time interleaved switching according to an embodiment of the present application;

[0045] Figure 4 is a schematic structural diagram of an on-chip implementation method of an optical-controlled true delay network based on wavelength-time interleaved switching according to an embodiment of the present application;

[0046] Figure 5 is a flowchart of an optical-controlled true delay method based on wavelength-time interleaved switching according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0048] The optical-controlled true time delay network and method based on wavelength-time interleaved switching according to the embodiments of the present application will be described below with reference to the accompanying drawings. Aiming at the problem of communication signal damage caused by the slow switching speed of the true time delay amount of optical signals in the related art mentioned in the above background art, the present application provides an optical-controlled true time delay network based on wavelength-time interleaved switching. Among them, a multi-wavelength signal generation module is used to generate multiple optical signals with different wavelengths and modulate them into multi-wavelength optical signals to be delay-regulated; a wavelength-time interleaved optical true time delay line module is used to perform multi-wavelength signal switching on the multi-wavelength optical signals to be delay-regulated in accordance with a preset wavelength-time interleaved order based on the received control signal, generate true time delay amounts of multiple single-wavelength signals, and output the time delay amount of the true time delay regulation signal from the true time delay amounts of the multiple single-wavelength signals based on the control signal; a photoelectric conversion module is used to convert the target true time delay amount into a radio frequency signal and output it. Thereby, problems such as communication signal damage caused by the slow switching speed of the true time delay amount of optical signals in the related art are solved, and high-frequency broadband true time delay regulation with fast switching, low loss, and anti-electromagnetic interference is realized.

[0049] Specifically, Figure 1 FIG. is a block diagram of an optical-controlled true time delay network based on wavelength-time interleaved switching provided by an embodiment of the present application.

[0050] As Figure 1 shown, the optical-controlled true time delay network 10 based on wavelength-time interleaved switching includes: a multi-wavelength signal generation module 100, a wavelength-time interleaved optical true time delay line module 200, and a photoelectric conversion module 300.

[0051] Among them, the multi-wavelength signal generation module 100 is used to generate multiple optical signals with different wavelengths and modulate the multiple optical signals with different wavelengths into multi-wavelength optical signals to be delay-regulated;

[0052] The wavelength-time interleaved optical true time delay line module 200 is used to perform multi-wavelength signal switching on the multi-wavelength optical signals to be delay-regulated in accordance with a preset wavelength-time interleaved order based on the received control signal, generate multiple single-wavelength signals after true time delay regulation, and select and output a true time delay regulation signal with a target time delay amount from the multiple single-wavelength signals based on the control signal;

[0053] The photoelectric conversion module 300 is used to convert the target true time delay signal into a radio frequency signal and output the radio frequency signal.

[0054] Among them, the preset wavelength-time interleaved order means switching the optical signal paths of different wavelengths at different time points and selecting the optical signals of a specific wavelength for output to achieve a specific true time delay effect.

[0055] Specifically, under the timing control of the control signal in the embodiments of the present application, different optical true delay amounts are regulated for optical signals of different wavelengths, and a high-speed routing switch selects and outputs corresponding wavelength signals. By using two-dimensional interleaving of wavelength and time, the "true delay line state switching" and the "change in the true delay amount of the output signal" are decoupled in the time domain, realizing fast true delay switching. In this way, the embodiments of the present application can not only overcome the limitations in the related technologies (such as slow delay amount switching speed, large signal damage, etc.), but also meet the high-frequency and large-bandwidth requirements in broadband wireless communication, providing an efficient and flexible true delay solution.

[0056] Optionally, in some embodiments, the multi-wavelength signal generation module 100 includes: a multi-wavelength light source array 101, a wavelength multiplexer 102, and an electro-optic modulator 103; wherein, the multi-wavelength light source array 101 is used to generate multiple optical signals of different wavelengths; the wavelength multiplexer 102 is used to combine the multiple optical signals of different wavelengths to obtain a multi-wavelength light source signal; the electro-optic modulator 103 is used to mix a preset radio frequency domain communication signal with the multi-wavelength light source signal to generate a multi-wavelength optical signal to be delay-regulated.

[0057] It can be understood that, as Figure 2 shown, Figure 2 FIG. is a schematic structural diagram of an implementation method of an optical control true delay network based on wavelength-time interleaving switching according to an embodiment of the present application. The multi-wavelength light source array 101 usually consists of multiple lasers or light-emitting diodes, and each light source generates an optical signal of a specific wavelength; the wavelength multiplexer 102 (such as a wavelength division multiplexer, Wavelength Division Multiplexing, WDM) combines the multiple optical signals of different wavelengths generated by the multi-wavelength light source array 101 into one path to form a composite optical signal containing multiple wavelengths, that is, a multi-wavelength light source signal; the electro-optic modulator 103 mixes a preset radio frequency domain communication signal with the multi-wavelength light source signal to generate a modulated multi-wavelength optical signal. The modulated optical signal carries the information of the radio frequency signal and becomes a multi-wavelength optical signal to be delay-regulated. The multi-wavelength signal generation module 100 efficiently generates a multi-wavelength optical signal to be delay-regulated through the coordinated work of the multi-wavelength light source array 101, the wavelength multiplexer 102, and the electro-optic modulator 103, providing a basis for subsequent true delay regulation.

[0058] Optionally, in some embodiments, the optical control true delay network 10 based on wavelength-time interleaving switching further includes: a control module 400 for generating a control signal.

[0059] Optionally, in some embodiments, the wavelength-time interleaved optical true time delay line module 200 includes a wavelength-division multiplexed optical true time delay array 201 and a high-speed routing switch 202. The wavelength-division multiplexed optical true time delay array 201 and the high-speed routing switch 202 are both connected to the control module 400. The output end of the wavelength-division multiplexed optical true time delay array 201 is connected to the input end of the high-speed routing switch 202, and the output end of the high-speed routing switch 202 is connected to the optoelectronic conversion module 300. The wavelength-division multiplexed optical true time delay array 201 is configured to route multi-wavelength optical signals to be delay-tuned to different optical delay paths 2012 in accordance with a preset wavelength interleaving order based on a control signal, so as to obtain multiple single-wavelength signals after true time delay tuning. The high-speed routing switch 202 is configured to route and determine a true time delay control signal with a target delay amount from the multiple single-wavelength signals after true time delay tuning based on a control signal.

[0060] It can be understood that, as Figure 3 shown, Figure 3 is a schematic diagram of the principle of an optical controlled true time delay network based on wavelength-time interleaved switching according to an embodiment of the present application. The electrical control signal generated by the control module 400 triggers the switching of the wavelength-division multiplexed optical true time delay array 201 and the high-speed routing switch 202 in chronological order, ensuring that optical signals of different wavelengths are processed and output in different time periods. The wavelength-division multiplexed optical true time delay array 201 can achieve true time delay tuning of multi-wavelength optical signals within the same delay array, reducing the number of optical delay paths 2012 and lowering costs. The optical controlled true time delay network 10 based on wavelength-time interleaved switching according to the embodiment of the present application has advantages such as low loss, no beam squint, and anti-electromagnetic interference, which is beneficial to true time delay control of high-frequency and broadband signals. At the same time, through the selection function of the high-speed routing switch 202 in the embodiment of the present application, rapid switching of the true time delay control signal is achieved, meeting the requirements of broadband wireless communication for rapid beam switching.

[0061] Optionally, in some embodiments, the wavelength-division multiplexed optical true time delay array 201 further includes cascaded multi-stage wavelength selective switches 2011 and optical delay paths 2012, where the multi-stage wavelength selective switches 2011 are constructed based on microring resonators.

[0062] It can be understood that the multi-stage wavelength selective switch 2011 has a slow switching speed and multiple input or output ports. Under the action of a control signal, it routes optical signals of different wavelengths to different optical delay paths 2012 in a wavelength interleaved order, generating different true delay amounts. The combined multi-wavelength optical signal output is separated by a wavelength demultiplexer 2013 and arranged into multiple single-wavelength signals. The optical delay path 2012 is used to provide different delay amounts for optical signals of different wavelengths, usually implemented by on-chip optical waveguides of different lengths. The longer optical waveguide corresponds to a larger delay amount, and the shorter optical waveguide corresponds to a smaller delay amount. The on-chip optical waveguide has the characteristics of low loss and high precision, and can achieve precise delay control. The micro-ring resonator is a device based on the optical resonance principle, which can selectively route optical signals to different output ports according to the wavelength, has a small volume, high integration, and fast response speed, and is suitable for on-chip integrated optical circuits.

[0063] Optionally, in some embodiments, the high-speed routing switch 202 is an electro-optic switch, and the optoelectronic conversion module 300 is a photodetector.

[0064] It can be understood that the high-speed routing switch 202 is an electro-optic switch with a fast switching speed. Under the action of a control signal, the electro-optic switch selects one output from multiple input signals of different wavelengths. Based on the electro-optic effect, the electro-optic switch can quickly switch the path of the optical signal and is suitable for the fast switching of high-frequency broadband signals. The optoelectronic conversion module 300 is a photodetector, which is used to convert the optical signal into a microwave signal output, with a fast response speed and high sensitivity.

[0065] To facilitate those skilled in the art to understand the optical control true delay network based on wavelength-time interleaved switching in the embodiments of the present application in detail, the following will be described in detail with reference to Figure 4 the embodiments shown.

[0066] Specifically, as Figure 4 shown, Figure 4Schematic diagram of the on-chip implementation method of an optical control true time delay network based on wavelength-time interleaved switching according to an embodiment of the present application; the multi-wavelength light source array 101 generates three optical signals λ1, λ2, and λ3 with different wavelengths; the wavelength multiplexer 102 combines the three optical signals λ1, λ2, and λ3 into one multi-wavelength optical signal; the electro-optic modulator 103 mixes the input radio frequency signal with the multi-wavelength optical signal to generate a multi-wavelength optical signal to be delay-controlled. The wavelength division multiplexing optical true time delay array is implemented in an on-chip integration manner, and the optical delay path is implemented by on-chip optical waveguides with different lengths; the wavelength division multiplexing optical true time delay array chip includes a plurality of microring resonators and electro-optic switches for wavelength selection and delay control; among them, the 3×3 wavelength selective switch is implemented by a microring resonator, which can route any wavelength input of the three channels to any channel output; the high-speed routing switch is implemented by an electro-optic switch; the control signal generator generates an electrical control signal to control the wavelength selective switch and the electro-optic switch to switch in the wavelength-time interleaved order, coordinating the operations of the microring resonators and electro-optic switches in the wavelength division multiplexing optical true time delay array chip; the wavelength demultiplexer (WDM) receives the optical signal output from the wavelength division multiplexing optical true time delay array chip and decomposes it back into the original different wavelength signals; the switching speed of the delay amount of the finally output true time delay control signal is determined by the electro-optic switch, thereby realizing the fast switching of the true time delay control; the photodetector converts the selected optical signal into a radio frequency signal for further use or analysis.

[0067] Therefore, the embodiment of the present application constructs a wavelength division multiplexing optical true time delay array, which can realize the true time delay tuning of multi-wavelength optical signals within the same time delay array, saving the optical delay path; cascading a secondary switch for high-speed wavelength routing and controlling the switching of the delay amount of the control signal. Based on this, the wavelength division multiplexing optical true time delay array and the high-speed routing switch are controlled to perform time interleaved switching, and the wavelength interleaved optical true time delay amount switching of the true time delay array is controlled, finally realizing the wavelength-time interleaved switching effect. Thus, through the novel optical true time delay line structure and the novel wavelength-time interleaved switching control, the multi-signal true time delay control is associated with the high-speed routing switch switching, realizing the fast switching of the true time delay amount of the signal; at the same time, the wavelength division multiplexing optical true time delay array has the advantages of multiplexing multiple signals and saving the optical delay path; the optical beam shaping network implemented based on the electro-optic switch and the optical true time delay path also has advantages such as low loss, no beam squint, and anti-electromagnetic interference, which is beneficial to the true time delay control of high-frequency and broadband signals.

[0068] The optical-control true time delay network based on wavelength-time interleaved switching proposed according to the embodiments of the present application generates multiple optical signals with different wavelengths through a multi-wavelength signal generation module, modulates them into multi-wavelength optical signals to be delay-regulated, and based on the received control signal through a wavelength-time interleaved optical true time delay line module, performs multi-wavelength signal switching on the multi-wavelength optical signals to be delay-regulated in a preset wavelength-time interleaved order, generates true time delay amounts of multiple single-wavelength signals, and outputs the time delay amount of the true time delay regulation signal from the true time delay amounts of the multiple single-wavelength signals based on the control signal. Then, through an optoelectronic conversion module, the target true time delay amount is converted into a radio frequency signal and the radio frequency signal is output. Thereby, the problem of communication signal damage caused by the slow switching speed of the true time delay amount of optical signals in the related art is solved, and high-frequency broadband true time delay regulation with fast switching, low loss, and anti-electromagnetic interference is realized.

[0069] Next, a description is given with reference to the drawings of an optical-control true time delay method based on wavelength-time interleaved switching proposed according to the embodiments of the present application.

[0070] Figure 5 is a flowchart of the optical-control true time delay method based on wavelength-time interleaved switching according to the embodiments of the present application.

[0071] In this embodiment, the optical-control true time delay method based on wavelength-time interleaved switching adopts Figure 1 the optical-control true time delay network based on wavelength-time interleaved switching shown in the embodiment.

[0072] As Figure 5 shown, the optical-control true time delay method based on wavelength-time interleaved switching includes the following steps:

[0073] In step S101, multiple optical signals with different wavelengths are generated through a multi-wavelength signal generation module, and the multiple optical signals with different wavelengths are modulated into multi-wavelength optical signals to be delay-regulated.

[0074] In step S102, based on the received control signal through a wavelength-time interleaved optical true time delay line module, multi-wavelength signal switching is performed on the multi-wavelength optical signals to be delay-regulated in a preset wavelength-time interleaved order, multiple single-wavelength signals after true time delay regulation are generated, and a true time delay regulation signal with a target time delay amount is selected and output from the multiple single-wavelength signals based on the control signal.

[0075] In step S103, the target true time delay signal is converted into a radio frequency signal through an optoelectronic conversion module, and the radio frequency signal is output.

[0076] Optionally, multiple optical signals with different wavelengths are generated by a multi-wavelength signal generation module, and the multiple optical signals with different wavelengths are modulated into a multi-wavelength optical signal to be delay-regulated, including: generating multiple optical signals with different wavelengths by a multi-wavelength light source array; combining the multiple optical signals with different wavelengths by using a wavelength multiplexer to obtain a multi-wavelength light source signal; and mixing a preset radio frequency domain communication signal with the multi-wavelength light source signal by an electro-optic modulator to generate a multi-wavelength optical signal to be delay-regulated.

[0077] Optionally, before the multi-wavelength signal switching of the multi-wavelength optical signal to be delay-regulated is performed based on the received control signal by a wavelength-time interleaved optical true delay line module in a preset wavelength-time interleaved order to generate true delay amounts of multiple single-wavelength signals, and the delay amount of the true delay regulation signal is output from the true delay amounts of the multiple single-wavelength signals based on the control signal, it further includes: generating a control signal by a control module.

[0078] Optionally, the multi-wavelength signal switching of the multi-wavelength optical signal to be delay-regulated is performed based on the received control signal by a wavelength-time interleaved optical true delay line module in a preset wavelength-time interleaved order to generate true delay amounts of multiple single-wavelength signals, and the delay amount of the true delay regulation signal is output from the true delay amounts of the multiple single-wavelength signals based on the control signal, including: routing the multi-wavelength optical signal to be delay-regulated to different optical delay paths in a preset wavelength interleaved order based on the control signal by a wavelength division multiplexing optical true delay array to obtain multiple single-wavelength signals after true delay regulation; and a high-speed routing switch for routing and determining a true delay regulation signal with a target delay amount from the multiple single-wavelength signals after true delay regulation based on the control signal.

[0079] It should be noted that the foregoing explanation of the embodiment of the optical control true delay network based on wavelength-time interleaved switching also applies to the optical control true delay method based on wavelength-time interleaved switching of this embodiment, and details are not described herein again.

[0080] According to the optical control true delay method based on wavelength-time interleaved switching proposed in the embodiment of the present application, multiple optical signals with different wavelengths are generated by a multi-wavelength signal generation module and modulated into a multi-wavelength optical signal to be delay-regulated. The multi-wavelength signal switching of the multi-wavelength optical signal to be delay-regulated is performed based on the received control signal by a wavelength-time interleaved optical true delay line module in a preset wavelength-time interleaved order to generate true delay amounts of multiple single-wavelength signals, and the delay amount of the true delay regulation signal is output from the true delay amounts of the multiple single-wavelength signals based on the control signal. The target true delay amount is converted into a radio frequency signal by an optoelectronic conversion module and the radio frequency signal is output. Thereby, the problem that the true delay amount switching speed of the optical signal is slow and causes communication signal damage in the related art is solved, and high-frequency broadband true delay regulation with fast switching, low loss, and anti-electromagnetic interference is realized.

[0081] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0082] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0083] Any process or method description shown in a flowchart or described in other ways herein may be understood to represent a module, segment, or portion of code including one or more N executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of this application includes additional implementations, where the functions may be executed in a manner that is not shown or discussed, including in a substantially simultaneous manner according to the involved functions or in a reverse order, which should be understood by those skilled in the art to which the embodiments of this application pertain.

[0084] It should be understood that each part of this application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one of the following techniques well known in the art or a combination of them can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0085] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

Claims

1. An optically controlled true delay network based on wavelength-time interleaving switching, characterized in that: include: A multi-wavelength signal generating module, used for generating multiple optical signals of different wavelengths, and modulating the multiple optical signals of different wavelengths into a multi-wavelength optical signal to be delayed and controlled; A wavelength-time interleaved optical true delay line module is used to perform multi-wavelength signal switching on the multi-wavelength optical signal to be delayed-controlled according to a preset wavelength-time interleaved sequence based on the received control signal, generate a plurality of single-wavelength signals after true delay control, and select a path from the plurality of single-wavelength signals to output a true delay-controlled signal with a target delay amount based on the control signal; The photoelectric conversion module is used to convert the target true delay signal into a radio frequency signal and output the radio frequency signal.

2. The optically controlled true delay network based on wavelength-time interleaving switching according to claim 1 is characterized in that: The multi-wavelength signal generation module comprises: a multi-wavelength light source array, a wavelength combiner and an electro-optical modulator; wherein, The multi-wavelength light source array is used to generate the multiple optical signals with different wavelengths; The wavelength combiner is used to combine the multiple optical signals of different wavelengths to obtain a multi-wavelength light source signal; The electro-optic modulator is used to mix a preset radio frequency domain communication signal with the multi-wavelength light source signal to generate the multi-wavelength light signal to be delayed and regulated.

3. The optically controlled true delay network based on wavelength-time interleaving switching according to claim 1 is characterized in that: Also includes: The control module is used to generate the control signal.

4. The optically controlled true delay network based on wavelength-time interleaving switching according to claim 3 is characterized in that: The wavelength-time interleaved optical true delay line module comprises: a wavelength multiplexing optical true delay array and a high-speed routing switch, wherein: The wavelength multiplexing optical true time delay array and the high-speed routing switch are both connected to the control module, the output end of the wavelength multiplexing optical true time delay array is connected to the input end of the high-speed routing switch, and the output end of the high-speed routing switch is connected to the photoelectric conversion module; The wavelength multiplexing optical true delay array is used to route the multi-wavelength optical signal to be delayed-controlled to different optical delay paths according to a preset wavelength interleaving order based on the control signal to obtain the multiple single-wavelength signals after the true delay control; The high-speed routing switch is used to select a route from the multiple single-wavelength signals after the true delay adjustment to determine the true delay adjustment signal with the target delay amount based on the control signal.

5. The optically controlled true delay network based on wavelength-time interleaving switching according to claim 4 is characterized in that: The wavelength multiplexing optical true delay array also includes: cascaded multi-stage wavelength selective switches and optical delay paths.

6. The optically controlled true delay network based on wavelength-time interleaving switching according to claim 4 is characterized in that: The high-speed routing switch is an electro-optical switch, and the photoelectric conversion module is a photoelectric detector.

7. A method for optically controlled true delay based on wavelength-time interleaving switching, characterized in that: An optically controlled true delay network based on wavelength-time interleaving switching as claimed in any one of claims 1 to 6 is adopted, wherein the method comprises the following steps: Generate multiple optical signals of different wavelengths by the multi-wavelength signal generating module, and modulate the multiple optical signals of different wavelengths into multi-wavelength optical signals to be delayed and controlled; Based on the received control signal, the wavelength-time interleaved optical true delay line module performs multi-wavelength signal switching on the multi-wavelength optical signal to be delayed-controlled in a preset wavelength-time interleaved order to generate a plurality of single-wavelength signals after true delay control, and selects a path from the plurality of single-wavelength signals after true delay control to output a true delay-controlled signal with a target delay amount based on the control signal; The true delay control signal with the target delay amount is converted into a radio frequency signal by the photoelectric conversion module, and the radio frequency signal is output.

8. The method according to claim 7, characterized in that The method of generating a plurality of optical signals of different wavelengths by the multi-wavelength signal generating module and modulating the plurality of optical signals of different wavelengths into a multi-wavelength optical signal to be delayed and controlled includes: Generate the multiple optical signals with different wavelengths by a multi-wavelength light source array; Combining the multiple optical signals of different wavelengths by using a wavelength combiner to obtain a multi-wavelength light source signal; The preset radio frequency domain communication signal is mixed with the multi-wavelength light source signal through an electro-optical modulator to generate the multi-wavelength light signal to be delayed and regulated.

9. The method according to claim 7, characterized in that: Before performing multi-wavelength signal switching on the multi-wavelength optical signal to be delayed-controlled in a preset wavelength-time interleaving sequence based on the received control signal by the wavelength-time interleaved optical true delay line module to generate a plurality of true delay amounts of single-wavelength signals, the method further includes: The control signal is generated by the control module.

10. The method according to claim 7, characterized in that The wavelength-time interleaved optical true delay line module switches the multi-wavelength optical signal to be delayed-controlled according to a preset wavelength-time interleaving sequence based on the received control signal, generates true delay amounts of multiple single-wavelength signals, and outputs the delay amount of the true delay control signal from the true delay amounts of the multiple single-wavelength signals based on the control signal, including: Based on the control signal, the wavelength multiplexing optical true delay array routes the multi-wavelength optical signal to be delayed-controlled to different optical delay paths in a preset wavelength interleaving order to obtain a plurality of single-wavelength signals after true delay control; A high-speed routing switch is used to select a route from the multiple single-wavelength signals after the true delay adjustment to determine the true delay adjustment signal with the target delay amount based on the control signal.

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