Device and method for generating single-cavity double-optical-frequency comb with adjustable repetition frequency

Abstract

The invention belongs to the technical field of optical frequency combs, and provides a repetition frequency adjustable single-cavity double-optical frequency comb generation device and method. The single-cavity double-optical frequency comb generation device comprises an optical resonant cavity and an optical frequency comb repetition frequency regulation and control module. Firstly, any optical resonant cavity is constructed, so that the optical resonant cavity can output a first optical frequency comb with a fixed repetition frequency; secondly, constructing an optical frequency comb repetition frequency regulation and control module, embedding the optical frequency comb repetition frequency regulation and control module into the optical resonant cavity, and realizing the regulation and control of the repetition frequency of the optical frequency comb and outputting a second optical frequency comb with adjustable repetition frequency by utilizing frequency domain and time domain second-order phase modulation based on an optical self-imaging principle; according to the single-cavity double-optical-frequency comb generation device and method, double-optical-frequency comb output with different repetition frequencies can be achieved in one resonant cavity, the repetition frequencies of the optical frequency combs are flexible and adjustable, and the single-cavity double-optical-frequency comb generation device and method have the advantages of being simple in structure, good in coherence, high in energy efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of optical frequency combs, and relates to a single-cavity dual-optical frequency comb generating device and method with adjustable repetition frequency. Background technique [0002] At present, dual-optical frequency comb technology has been widely used in ranging, spectral measurement, optical fiber sensing, microwave photonics and other fields due to its good stability and coherence. Existing methods for generating dual optical frequency combs mainly include: locking the comb-tooth frequency of two independent optical frequency comb signal sources; or realizing two-way electro-optic modulation based on continuous wave lasers; or directly forming two sets of optical frequency combs in a microring resonator Stable optical frequency comb. In the academic paper "Single-cavity dual-comb mode-locked fiber laser and its application research progress" published in "China Laser", Yang Changxi et al. reviewed the...

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Problems solved by technology

[0003] The present invention mainly aims at the lack of a flexible and adjustable repetition frequency and a simple system structure in the existing dual optical frequency comb generation technology, and proposes a single-cavity dual optical frequency comb generation device and method with adjustable repetition frequency

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