Wavelength division multiplexing-based chromatic dispersion and non-chromatic dispersion device cascaded large-scale optical true time delay network

Abstract

The invention provides a wavelength division multiplexing-based dispersive and non-dispersive device cascaded large optical true time delay network. The network comprises a multi-wavelength light source, an electro-optical modulation unit and a dispersive and non-dispersive device cascaded true time delay unit, wherein the multi-wavelength light source comprises a plurality of light wave components with equal wavelength intervals; the chromatic dispersion and non-chromatic dispersion device cascade true time delay unit is composed of a programmable chromatic dispersion device matrix, a programmable non-chromatic dispersion device array and a wavelength demultiplexer which are cascaded, wherein the programmable dispersion device matrix comprises a plurality of dispersion controllers and dispersion devices which are arranged at intervals; the programmable non-dispersive device array is provided with a plurality of paths, only a non-dispersive device is arranged in the first path, and therest paths respectively comprise a plurality of delay controllers and non-dispersive devices which are arranged at intervals. According to the method, wavelength division multiplexing is utilized, the number of channels of the true time delay network is increased while the requirement of wavelength division multiplexing for the number of carrier wavelengths is reduced, and the true time delay network with high channel consistency and low time delay error is obtained under the condition of low system complexity.

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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