Optical frequency comb significantly spanned to broadband by an optomechanical resonance  

作　　者：XIN GU JINLIAN ZHANG SHULIN DING XIAOSHUN JIANG BING HE QING LIN 

机构地区：[1]Fujian Provincial Key Laboratory of Light Propagation and Transformation,College of Information Science and Engineering,Huaqiao University,Xiamen 361021,China [2]National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China [3]Multidisciplinary Center for Physics,Universidad Mayor,Camino La Pirámide 5750,Huechuraba,RM,Chile

出　　处：《Photonics Research》2024年第9期1981-1990,共10页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(12374348,12293054,12341403);Agencia Nacional de Investigación y Desarrollo(1221250);National Key Research and Development Program of China(2021YFA1400803).

摘　　要：An optical frequency comb,as a spectrum made of discrete and equally spaced spectral lines,is a light source with essential applications in modern technology.Cavity optomechanical systems were found to be a feasible candidate for realizing an on-chip frequency comb with low repetition rate.However,it was difficult to increase the comb line numbers of this type of frequency combs because the mechanical oscillation amplitude of such a system,which determines the frequency comb bandwidth,cannot quickly increase with pump laser power.Here,we develop a new approach to generate a broadband optomechanical frequency comb by employing a different mechanism to enhance the mechanical oscillation.Two pump tones with their frequency difference matching the mechanical frequency will drive the system into a self-organized nonlinear resonance and thus tremendously transfer the energy to the mechanical resonator.As a result,more than 10,000 or even more comb lines become available under the pump laser power of the order of milliwatts.A unique feature of the self-organized resonance is the mechanical frequency locking so that,within a certain range of the frequency difference between two drive tones,the distance between comb teeth can be locked by the two drive tones and becomes independent of any change of pump power.This property guarantees a stable repetition rate of the generated frequency comb.

关 键 词：PUMP RESONATOR REPETITION 

分 类 号：O43[机械工程—光学工程]