Optical Frequency Comb Repetition Frequency Divider Based on Fiber Interferometer

Abstract

The invention relates to an optical frequency comb repetition frequency divider based on an optical fiber interferometer. The optical frequency comb repetition frequency divider based on the optical fiber interferometer comprises 1x2 directional polarization maintaining optical fiber coupler, an N-arm frequency-shifted Mach-Zehnder interferometer system and a repetition frequency integrated system, wherein the N-arm frequency-shifted Mach-Zehnder interferometer system consists of a 1xN directional polarization maintaining optical fiber coupler, N-1 acousto-optic modulators AOM1, AOM1, AOM3 and so on and AOMN-1 with tail fibers which are polarization maintaining optical fibers, and an Nx1 directional polarization maintaining optical fiber coupler and polarization maintaining optical fibers with certain length. The optical frequency comb repetition frequency divider based on the optical fiber interferometer realizes the control of optical frequency of an optical frequency comb, a new optical frequency comb is generated and the repetition frequency is 1 / N of the repetition frequency of the original optical frequency comb.

Description

technical field [0001] The invention relates to a frequency divider, in particular to an optical frequency comb repetition frequency divider based on optical fibers and optical fiber devices. Background technique [0002] The femtosecond optical frequency comb locks the repetition frequency and bias frequency of the femtosecond mode-locked laser to the microwave frequency reference, obtains a femtosecond pulsed laser with a stable repetition rate in the time domain, and obtains a laser frequency comb with a stable frequency interval in the frequency domain . As a bridge between microwave frequency and optical frequency, femtosecond optical frequency comb can be regarded as a highly accurate and traceable laser frequency ruler in the frequency domain, so it can realize direct and precise measurement of laser frequency, and also It can be combined with ultra-stable lasers to generate ultra-low noise microwave frequency signals. At the same time, as a special laser light sour...

AI Technical Summary

Problems solved by technology

At present, optical frequency comb repetition frequency doubling can be realized by using Fabry-Perot cavity spectral filtering and fiber interferometer, but there is no related device for optical frequency comb repetition frequency division

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