Cascade large-scale optical real-time delay network with dispersive and non-dispersive devices based on wavelength division multiplexing

Abstract

The present invention proposes a cascaded large-scale optical true delay network based on wavelength division multiplexing of dispersive and non-dispersive devices, including a multi-wavelength light source, an electro-optical modulation unit, and a cascaded true delay unit of dispersive and non-dispersive devices; a multi-wavelength light source Contains multiple light wave components with equal wavelength intervals; the cascaded true delay unit of dispersive and non-dispersive devices is composed of cascaded programmable dispersive device arrays, programmable non-dispersive device arrays and wavelength demultiplexers; programmable dispersive device matrix Including multiple dispersive controllers and dispersive devices set at intervals; the programmable non-dispersive device array has multiple channels, the first channel is only provided with non-dispersive devices, and the remaining channels include multiple delay controllers set at intervals and non-dispersive devices. The present invention utilizes wavelength division multiplexing to increase the number of true-delay network channels while reducing the requirement of wavelength-division multiplexing on the number of carrier wavelengths, and obtain true delay with high channel consistency and low delay error under the condition of low system complexity time network.

Description

technical field [0001] The invention relates to the technical field of microwave photons and optical control beamforming, in particular to a cascaded large-scale optical real-time delay network based on wavelength division multiplexing with dispersive and non-dispersive devices. Background technique [0002] The scanning technology of radar antenna has important military and civilian value. At first, people used mechanical radar to realize radar scanning by rotating the mechanical structure, but the mechanical structure had obvious disadvantages in terms of scanning speed, stability, and volume. With the development of technology, it was gradually replaced by phased array technology. Phased array technology uses the interference between sub-array signals to form a stable and controllable beam pointing. As an antenna structure that can realize beam directional scanning, phased array antenna has many advantages such as high scanning speed, simultaneous scanning of multiple be...

AI Technical Summary

Problems solved by technology

The integrated solution is small in size, but still has a large gap with the discrete device system in terms of operating bandwidth, delay, and loss; the space optics solution is bulky, and has obvious disadvantages compared with the system using optical fibers; The solution often used by devices, the technology is mature, but when building a multi-channel large-scale system, there are problems of large system size, poor consistency between channels, and large relative delay errors between channels

In systems that use dispersive devices or non-dispersive devices to achieve large-scale true delay, limited by the inconsistency between channels, multi-channel true delay is very difficult to achieve, and the amount of delay is also limited by the size of the device

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