混沌激光偏振度对同步质量影响的实验研究  

Experimental Research on Effect of Degree of Polarization of Chaotic Laser on Synchronization Quality

作　　者：申嘉皓 狄呈震 黄辉宇 师天一 王龙生[1,2] 王安帮 杨毅彪[1] 王云才 Shen Jiahao;Di Chengzhen;Huang Huiyu;Shi Tianyi;Wang Longsheng;Wang Anbang;Yang Yibiao;Wang Yuncai(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,Jilin,China;Guangdong Provincial Key Laboratory of Information Photonics Technology,College of Information Engineering,Guangdong University of Technology,Guangzhou 510006,Guangdong,China;College of Optoelectronic Engineering and Instrumentation Science,Dalian University of Technology,Dalian 116024,Liaoning,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/山西省重点实验室,山西太原030024 [2]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [3]广东工业大学广东省信息光子技术重点实验室,广东广州510006 [4]大连理工大学光电工程与仪器学院,辽宁大连116024

出　　处：《光学学报》2023年第21期186-194,共9页Acta Optica Sinica

基　　金：国家自然科学基金(62035009,62105233);山西省“1331工程”重点创新团队;山西省重点研发计划国际合作项目(201903D421012);中央引导地方科技发展基金(YDZJSX2021A009);应用光学国家重点实验室开放基金(SKLAO2022001A09);中物院创新发展基金(C-2023-CX20230030)。

摘　　要：对主从开环结构下,混沌激光偏振度对混沌同步质量的影响进行实验研究。在背靠背和200 km传输条件下,分析混沌激光偏振度以及同步质量的演变规律,发现随着距离和时间的增加,混沌激光偏振度逐渐减小,导致激光器的有效注入强度降低,进而削弱了注入锁定效应,恶化了主从混沌同步质量。增大注入强度可以提高同步质量对偏振度变化的容忍度,有助于实现稳定的长距离混沌激光同步。Objective Secure communication based on chaotic laser has received much attention in recent years because of its high speed,long distance,and compatibility with existing fiber-optic networks.Much effort has been devoted to improving the rate of chaotic secure communication by increasing chaos bandwidth or using higher-order modulation.Unfortunately,there still exists a rate gap between the chaotic secure communication and the current fiber-optic communication.Polarization division multiplexing of chaotic laser is a potential alternative to reduce the rate gap.The key to implementing the polarization division multiplexing-based chaotic secure communication is establishing high-quality chaos synchronization.However,the influences of polarization of chaotic laser,i.e.,the degree of polarization(DOP),on the chaos synchronization are not ascertained clearly.In this paper,the effects of DOP of chaotic laser on the synchronization quality are investigated experimentally,and the optimization methods and conditions are achieved for yielding high-quality and stable chaos synchronization.This work underlies the high-speed chaotic secure communication using polarization division multiplexing.Methods Firstly,we generate a chaotic laser from the master laser subject to mirror optical feedback and use the polarization controller and polarization beam splitter to make the chaotic laser characterized with a single polarization.Then,we inject it unidirectionally into the slave laser over the fiber link to achieve the single-polarization master-slave open-loop chaos synchronization.The polarization controller can adjust the state of polarization of the chaotic laser,and the DOP can be analyzed quantitatively by detecting the power from the output ports of the polarization beam splitter.Based on this experimental system,we examine the evolution of DOP and analyze its effect on the synchronization quality over time for fiber links with different transmission distances,when the threshold point(0.90)and the critical saturation point of

关 键 词：激光器 光偏振度 混沌激光 混沌同步 混沌保密通信 

分 类 号：TN248.4[电子电信—物理电子学]