深圳大学学报（理工版）2026，Vol.43Issue(2)：209-214,6.DOI:10.3724/SP.J.1249.2026.02209
基于光注入直接调制半导体激光器的混沌带宽增强
Chaos bandwidth enhancement via optical injection and direct modulation of semiconductor lasers
摘要
Abstract
A scheme for enhancing the chaos bandwidth by directly modulating semiconductor lasers subject to optical injection is proposed.A unidirectional master-slave configuration is constructed using two free-running semiconductor lasers.By introducing direct modulation to generate modulation sidebands in semiconductor lasers,the bandwidth of the original chaos signal can be enhanced through optimization of modulation depth,modulation frequency,frequency detuning and injection intensity.Experimental results show that when the current modulation frequencies applied to the master and slave lasers are 1.3 GHz and 1.6 GHz,respectively,the maximum bandwidth of the chaos signal of an optically injected distributed feedback semiconductor laser increases from 7.2 GHz to 14.1 GHz,corresponding to nearly a twofold enhancement.Further analysis of the modulation-induced spectral evolution reveals that the bandwidth enhancement originates from beat-frequency interactions between the modulation sidebands of the two semiconductor lasers,which effectively broaden the chaotic spectrum.关键词
光学工程/混沌激光/半导体激光器/带宽/直接调制/单向光注入/拍频Key words
optical engineering/chaotic laser/semiconductor laser/bandwidth/direct modulation/unidirectional optical injection/beat frequency分类
信息技术与安全科学引用本文复制引用
尚锦涵,熊浩凯,张建国,李璞..基于光注入直接调制半导体激光器的混沌带宽增强[J].深圳大学学报（理工版）,2026,43(2):209-214,6.基金项目
National Key Research and Development Program of China(2024YFB2808400) （2024YFB2808400）
National Natural Science Foundation of China(62175177,62322504) （62175177,62322504）
Guangdong Introducing Innovative and Entrepreneurial Teams of"The Pearl River Talent Recruitment Program"(2019ZT08X340) 国家重点研发计划资助项目(2024YFB2808400) （2019ZT08X340）
国家自然科学基金资助项目(62175177,62322504) （62175177,62322504）
广东省引进珠江人才招聘计划创新团队资助项目(2019ZT08X340) （2019ZT08X340）
