Microwave generation system

Abstract

The embodiment of the invention discloses a microwave generation system. The system comprises a wavelength-adjustable light source, a polarization controller, a first circulator, an optical fiber, a first filter, an optical microcavity and a first photoelectric detector, wherein the optical microcavity comprises a substrate, and a support column and a cavity body which are positioned on one side of the substrate; the wavelength-adjustable light source is used for providing pump light; the polarization controller is used for adjusting the polarization direction of the pump light so as to adjustthe coupling efficiency; pump light excites backward Brillouin laser in the optical microcavity, a four-wave mixing effect occurs in the optical microcavity, and a dissipative Kerr soliton frequencycomb is generated. The first filter is used for filtering the pump light and the backward Brillouin laser, so the dissipative Kerr soliton frequency comb is transmitted to the first photoelectric detector to generate a microwave signal. According to the technical scheme provided by the embodiment of the invention, the dissipative Kerr soliton frequency comb is generated by utilizing the backward Brillouin laser and is converted into the microwave signal by the high-speed photoelectric detector, and a complex electrical device does not need to be introduced, so the miniaturization and integration of the system are realized.

Description

technical field [0001] Embodiments of the present invention relate to microwave signal generation technology, and in particular to a microwave generation system. Background technique [0002] Microwave sources with low phase noise are widely used in optical communication networks, radar, lidar and basic research. Traditional electronic oscillators are difficult to generate high-frequency microwaves with high spectral purity. In recent years, the use of high-speed optical detectors to convert the optical signals of multiple phase-locked lasers into microwave signals has attracted extensive attention. [0003] Among them, in order to further realize the miniaturization of microwave sources, microcavity soliton frequency combs have been used to generate microwave signals with high frequency and low phase noise. The phase noise of the microwave signal generated by the microcavity soliton frequency comb is related to the phase noise and relative intensity noise of the pump lase...

AI Technical Summary

Problems solved by technology

These methods require the addition of complex optical and electrical components, which is not conducive to the miniaturization of low-phase-noise microwave sources

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