混沌光纤激光器偏振分量的动力学特性  

Dynamics of polarization components of chaotic fiber laser

作　　者：樊林林[1,2] 杨玲珍[1,3] 王娟芬 丁伟杰[1,4] 李一潇 齐琎 FAN Linlin;YANG Lingzhen;WANG Juanfen;DING Weijie;LI Yixiao;QI Jin(College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Physics,Taiyuan University of Technology,Taiyuan 030024,China;Lab of Advanced Transducers and Intelligent Control System,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Department of Physics,Xinzhou Normal University,Xinzhou 034000,China)

机构地区：[1]太原理工大学电子信息与光学工程学院,山西太原030024 [2]太原理工大学物理学院,山西太原030024 [3]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 [4]山西省忻州师范学院,山西忻州034000

出　　处：《红外与激光工程》2024年第8期171-177,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金项目(61575137,61975149)。

摘　　要：实验利用光纤的非线性克尔效应在掺铒光纤激光器中实现混沌激光的输出,详细研究了泵浦电流和偏振态等因素对系统输出的影响,分别对混沌光纤激光器偏振分量的输出功率,动态演变、互相关特性及光谱等动力学特性进行了详细分析。结果表明,混沌光纤激光器及其偏振分量的输出功率随泵浦电流的变化呈线性关系。随着泵浦电流的增加,混沌激光偏振分量历经周期、混沌和自脉冲的输出状态,与混沌激光器输出的动态演变步调一致。不同偏振态下,混沌激光偏振分量同样可实现从周期到混沌脉冲串的动态演变过程,偏振分量之间的相关性与系统的输出状态密切相关。实验对不同泵浦电流的光谱进行了分析,光谱的形状不随激光器输出的不同状态而改变,其中心波长基本保持不变。实验结果对研究新型偏振可控光纤激光器及多路光纤传感等应用提供了一种新思路,该工作对于探索混沌光纤激光器偏振分量的非线性动力学特性具有重要意义。Objective Chaotic laser has attracted much attention in the laser field in recent years and there is a wide range of applications in optical secure communication,chaos lidar,optical fiber sensing and biomedicine because of their advantages such as strong randomness and anti-interference,noise-like time series andδ-like autocorrelation function.The measurement resolution and sensing accuracy of chaotic laser are directly affected by the nonlinear characteristics of fiber laser,among which the polarization characteristics of the laser are very important for the practical application and basic research of laser.However,the laser stimulated photon and the excited photon have the same frequency,direction,phase and polarization because of its stimulated radiation.Therefore,the laser polarization characteristics will be affected by the laser gain medium,internal structure and other factors.However,in recent years,most researchers have only studied laser polarization characteristics for solving specific technologies,focusing on the detection,control of laser polarization and the polarization dynamics of vector solitons,instead of analyzing the change and regularity of laser polarization characteristics from the internal optical path of the system.The dynamic characteristics of output polarization components of chaotic fiber lasers are rarely discussed.In practical applications,optical nonlinear effect and fiber strain have certain influence on the polarization characteristics of laser.So,the output dynamic characteristics of the polarization component of chaotic fiber lasers are studied in detail in this paper.Methods The chaotic laser is generated based on the nonlinear Kerr effect with an erbium-doped fiber ring laser(EDFRL),and the dynamics of the polarization components of the chaotic laser is experimentally studied by adjusting the pump current and the polarization.The output power,dynamic evolution,correlation and spectral characteristics of the polarization components of the chaotic fiber lasers are analyzed in d

关 键 词：混沌光纤激光器 偏振 自相关 动力学特性 自脉冲 

分 类 号：O439[机械工程—光学工程]