Microwave frequency comb generation method and microwave frequency comb generator

Abstract

The invention discloses a method for generating a microwave frequency comb, which belongs to the technical field of microwave photons. First, inject the DC optical signal with adjustable amplitude into the semiconductor laser, so that the semiconductor laser works in a single-cycle oscillation state; then divide the output optical signal of the semiconductor laser into upper and lower paths, and the upper path undergoes photoelectric conversion, delay, and amplification. As a feedback signal, it is re-modulated to the semiconductor laser to form a photoelectric feedback loop; the downstream optical signal is sent to the photodetector for photoelectric conversion; the amplitude of the DC optical signal is modulated so that the amplitude of the DC optical signal is periodic The linear change of the property, and make the delay of the photoelectric feedback loop be an integer multiple of the linear change period of the amplitude of the DC optical signal. At this time, the output of the down channel photodetector is the microwave frequency comb signal. The invention also discloses a microwave frequency comb generating device. The invention can generate a microwave frequency comb signal with large bandwidth, high and fine comb-tooth spacing, and tunable bandwidth, center frequency and comb-tooth spacing.

Description

technical field [0001] The invention relates to a method and a device for generating a microwave frequency comb, belonging to the technical field of microwave photons. Background technique [0002] Microwave frequency comb refers to a series of comb-shaped microwave signals with equal frequency intervals. Due to the characteristics of many frequency components, wide frequency range, and high precision of spectral line spacing, it has a wide range of applications in the fields of communication, radar, measurement, and imaging. For example, microwave frequency comb signals can provide synchronization signals in electronic warfare systems for detection and processing within a large bandwidth; in radio frequency interference testing, microwave frequency combs can simulate radiation for electromagnetic compatibility (EMC) testing; In frequency conversion radar, microwave frequency comb can be used to provide more than dozens of high-purity frequency points at the same time. In ...

AI Technical Summary

Problems solved by technology

However, there are obvious problems in these methods at present. On the one hand, the optical frequency comb system itself is complex and the cost is high; Poor stability and difficult to adjust the spacing of comb teeth

These problems make it difficult for current microwave frequency comb signal generation methods based on photonic technology to meet the needs of practical applications.

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