基于光反馈双模DFB激光器的宽带混沌信号产生  

Broadband Chaos Signal Generation Based on Dual-mode DFB Laser with Optical Feedback

作　　者：张艺腾 贾志伟 李青天 王龙生 王安帮 Zhang Yiteng;Jia Zhiwei;Li Qingtian;Wang Longsheng;Wang Anbang(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原理工大学新型传感器与智能控制教育部重点实验室,山西太原030024 [2]太原理工大学物理与光电工程学院,山西太原030024

出　　处：《光学学报》2021年第21期131-138,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61822509,62035009,61713014,61927811,61961136002);山西“1331项目”重点创新研究团队。

摘　　要：提出并数值验证了一种利用光反馈双模分布式反馈(DM-DFB)半导体激光器产生宽带混沌信号的方法。通过双纵模Lang-Kobayashi方程建立了光反馈DM-DFB半导体激光器的理论模型,探明了宽带混沌信号产生的物理机制为模式拍频,数值分析了模式间隔、偏置电流和反馈系数对混沌带宽的影响。仿真设计了双模激光器,在镜面反馈系统中,高偏置电流和强反馈强度条件下可以产生38.6 GHz的混沌信号。这一结构为宽带集成混沌源提供了一种新思路。We proposed and numerically verified a method of generating broadband chaotic signals using a dual-mode distributed feedback(DM-DFB)semiconductor laser with optical feedback.A theoretical model of the laser was established according to the dual-longitudinal-mode Lang-Kobayashi equation.It was determined that the generation mechanism of the broadband chaotic signals was the mode beat effect.The influences of mode interval,bias current,and feedback coefficient on the chaotic signal bandwidth were numerically investigated.Subsequently,a dual-mode laser was designed by simulation.In the mirror feedback system,a chaotic signal with a bandwidth of 38.6 GHz was generated under a high bias current and strong feedback intensity.The structure provides a new idea for broadband integrated chaotic sources.

关 键 词：激光器 半导体激光器 双模分布式反馈激光器 宽带混沌 光反馈 光子集成 

分 类 号：TN248.4[电子电信—物理电子学]