Method for generating time domain cavity solitons and soliton frequency combs based on intracavity pumping mode

Abstract

The invention, which belongs to the technical field of optical frequency combs, discloses a method for generating time domain cavity solitons and soliton frequency combs based on an intracavity pumping mode. According to the invention, with an intracavity pumping Kerr nonlinear optical cavity, a Brillouin gain is introduced into the cavity and generated Brillouin laser serves as intracavity pumping light, and a laser cavity is coherently driven to spontaneously generate time domain cavity solitons; and the intracavity pumping light generates soliton frequency combs through a cascaded four-wavemixing effect. Therefore, a cavity soliton pulse and a soliton frequency comb with the tunable repetition frequency are obtained by changing the frequency interval of a multi-wavelength laser source.

Description

technical field [0001] The invention belongs to the technical field of optical frequency combs, and in particular relates to a method for generating time-domain cavity solitons and soliton frequency combs based on intracavity pumping. Background technique [0002] A time-domain cavity soliton is an ultrashort-pulse laser that maintains its pulse shape while propagating in a Kerr nonlinear optical cavity. Due to this characteristic, it has important application value in the fields of optical communication, tunable microwave and terahertz wave generation, spectroscopy, and distance measurement. The formation of time-domain cavity solitons needs to achieve a double balance between nonlinear effects and dispersion, gain and loss in the Kerr nonlinear optical cavity. At present, researchers have observed time-domain cavity solitons in optical fiber ring cavities and optical microcavities. In 2010, researchers obtained time-domain cavity solitons for the first time by simultaneo...

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Problems solved by technology

First, in order to drive the cavity to generate time-domain cavity solitons, the operating frequency of the injected pump light must be finely tuned to the red-shifted detuning frequency; second, since the cavity resonance frequency is easily affected by thermal effects and other environmental disturbances, real-time, fast The long-term operation of the soliton can only be achieved by precisely controlling the frequency of the injected pump light; moreover, the repetition frequency of the above-mentioned time-domain cavity soliton is mainly determined by the cavity length, and it is difficult to obtain a soliton frequency comb with a wide range of repetition frequency tunable. Frequency combs with tunable repetition rates over a wide range have important applications in optical communications, optical sensing, spectroscopy, tunable microwave or terahertz wave generation, etc.

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