High-speed tunable microwave photon filter

Abstract

The invention discloses a high-speed tunable microwave photon filter which is mainly composed of a light source 100, an optical divider 101, an intensity modulator 102, a dual-drive Mach-Zehnder modulator 103, an optical band pass filter 104, a polarization beam combiner 105 and a photoelectric detector 106. A microwave signal 107 is an input signal, a digital signal 108 is a control signal, and high-speed time switch of the transmission function of the filter can be achieved by directly loading the control signal to an optical modulator. The high-speed tunable microwave photon filter is simple in structure, easy to integrate, capable of achieving picosecond-level high-speed tunability, and capable of being used for high speed switch and frequency hopping signal processing in a dynamic optical network and cognitive radio system.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to a high-speed tunable microwave photon filter. It is suitable for solving high-speed dynamic signal processing of high-frequency and ultra-high-frequency microwave signals in frequency hopping communication and recognition of radio, such as high-speed switching and dynamic filtering. Background technique [0002] Microwave photonic filters are filters that realize microwaves through photonic systems. Compared with traditional microwave filters, microwave photonic filters have the advantages of low loss, wide bandwidth, large tunability, and no electromagnetic interference. They can be used in high High-frequency, ultra-high-frequency microwave signal processing, suitable for radar, radio and other systems. At the same time, with the introduction of the concept of cognitive radio, that is, cognitive radio refers to the fact that radio signals can adaptively select free f...

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Problems solved by technology

[0004] The above schemes of microwave photonic filters are mainly researches on statically tunable microwave photonic filters. Although the research on high-speed tunable microwave photonic filters has begun, the scheme based on fast optical delay line is based on the The complex structure and limited high-speed adjustability restrict the further development of high-speed dynamic network and cognitive radio technology.

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