Self-locking photoelectric oscillator and method thereof

Abstract

The invention discloses a self-locking photoelectric oscillator and a method thereof. The self-locking photoelectric oscillator includes devices such as a semiconductor optical amplifier, an optical circulator, a narrow-band optical filter, a fiber beam splitter, a comb optical filter, an electrooptical modulator, a photoelectric detector, a microwave amplifier, and a microwave coupler and the like. A closed optical loop formed by the semiconductor optical amplifier, the optical circulator, the narrow-band optical filter, an output end of the fiber beam splitter and the comb optical filter generates stable single longitudinal mode laser output. A closed photoelectric loop formed by the other output end of the fiber beam splitter, the electrooptical modulator, the optical circulator, the comb optical filter, the photoelectric detector, the microwave amplifier and an output end of the microwave coupler generates stable single-frequency microwave signals. Multi-order harmonic-wave sidebands generated through modulation of the photoelectric loops undergo model selection via the comb optical filter so that a frequency self-locking effect is generated and generated microwave signals have the advantages of great frequency stability and high frequency purity.

Description

technical field [0001] The invention relates to the field of microwave photons and optical communication where microwave / millimeter wave signals are generated, in particular to a self-locking photoelectric oscillator and a method thereof. Background technique [0002] In the fields of modern radar, wireless communication, software radio, test and measurement, high-quality microwave sources with low phase noise, high spectral purity, and high frequency stability play an important role. For traditional RF / microwave signal sources, such as frequency synthesizers, electronic oscillators, etc., microwave signals have disadvantages such as large phase noise, low spectral purity, insufficient frequency, and insufficient frequency stability. [0003] An optoelectronic oscillator is a microwave signal device that converts continuous light energy into a periodically transformed microwave signal through an optoelectronic device using the advantages of microwave photonics. It solves ma...

AI Technical Summary

Problems solved by technology

Compared with electric oscillators, optoelectronic oscillators based on the various structures mentioned above solve the problems of insufficient frequency and poor phase noise performance. However, since the entire optoelectronic oscillation loop does not use specific frequency stabilization technology, it will still fail Avoid the problem of insufficient frequency stability

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