Certainty soliton mode locking method for Kerr optical frequency comb in optical microcavity

Abstract

The invention discloses a certainty soliton mode locking method for a Kerr optical frequency comb in an optical microcavity. A pump laser power is set to be less than optical microcavity parametric oscillation threshold valve power; the generated pump laser is modulated; the frequency of a modulating signal is accordant with free frequency spectrum width of the optical microcavity; the amplitude of the modulating signal is obtained by calculating three-order dispersion value of the optical microcavity; the pump laser, after being subjected to phase modulation, enters the optical microcavity through a microcavity coupler in a coupling manner; the coupling coefficient is controlled to enable the optical microcavity to work in a critical coupling state; the pump laser is scanned from a long wavelength direction to a short wavelength direction in the optical microcavity; the spectrum of the output pump laser is collected at the output end of the optical microcavity; and in case that the current pump laser spectrum comprises a smooth envelope, the soliton mode locking is finished, and the scanning is stopped. According to the certainty soliton mode locking method for the Kerr optical frequency comb in the optical microcavity, the problems of high randomness, low reliability, high probability of disturbance and the like of the existing Kerr optical frequency comb mode locking scheme are overcame, so that the rapid and accurate soliton mode locking is realized.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more specifically relates to a deterministic soliton mode-locking method of a Kerr optical comb in an optical microcavity. Background technique [0002] The invention of the optical frequency comb, or optical comb for short, provided a revolutionary tool for precision time / frequency measurements. The optical comb is like an optical gear set, which can accurately divide the optical frequency to a lower microwave frequency, and realize the precise transmission of the optical frequency standard to the microwave frequency, thereby promoting the development of optical clocks and greatly improving the accuracy of time measurement. Spend. In addition, optical combs are also used in many fields such as precision spectroscopy, astronomical spectral calibration, ultra-stable microwave oscillators, and high-speed optical communications. Currently, the vast majority of optical combs are b...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a deterministic soliton mode-locking method for Kerr optical combs in optical microcavities, to overcome the strong randomness, poor reliability and vulnerability of existing Kerr optical comb mode-locking schemes. Disturbance and other problems, so as to quickly and deterministically achieve soliton mode locking

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