锁模光纤激光器的偏振同步与去同步动力学  

Polarization Synchronization and Desynchronization Dynamics of Mode-locked Fiber Lasers

作　　者：黄志玮 黄千千 黄梓楠 李卫淅 戴礼龙 王明娇 代雨泽 王青 闫志君 Sergeyev Sergey 牟成博 Huang Zhiwei;Huang Qianqian;Huang Zinan;Li Weixi;Dai Lilong;Wang Mingjiao;Dai Yuze;Wang Qing;Yan Zhijun;Sergeyev Sergey;Mou Chengbo(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China;National Engineering Laboratory for Next Generation Internet Access System,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Aston Institute of Photonic Technologies(AIPT),Aston University,Aston Triangle,Birmingham B47ET,UK)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200444 [2]华中科技大学下一代互联网接入系统国家工程实验室,湖北武汉430074 [3]阿斯顿大学阿斯顿光子技术研究所,伯明翰B47ET

出　　处：《激光与光电子学进展》2024年第9期329-335,共7页Laser & Optoelectronics Progress

摘　　要：基于正色散的非线性偏振旋转(NPR)锁模光纤激光器,在稳定的连续波(CW)锁模状态和复合锁模状态下分析脉冲的偏振特性。通过单一调节泵浦功率,实现稳定的CW锁模状态下耗散孤子(DS)与类噪声(NLP)两种脉冲的切换。另外,固定泵浦功率,仅调节偏振控制器(PCs)可得到由脉冲状态自发切换引起的复合锁模状态。对比分析两种锁模状态下的脉冲偏振特性,发现纵模相位锁定的同步对应于脉冲正交偏振分量的完全同步,纵模相位在同步与去同步切换状态下的复合锁模对应于脉冲正交偏振分量的部分同步。实验结果表明,纵模相位间的同步状态受脉冲正交偏振分量影响。该工作对理解锁模激光器中复杂动力学、发展稳定的激光动力学技术具有指导意义。In this study,using a nonlinearpolarizationrotation(NPR)modelocked fiber laser with positive dispersion as a testbed,the polarization characteristics of the pulse are analyzed in both complete modelocked and composite modelocked states.The switching from dissipative soliton(DS)and noise like pulse(NLP)can be achieved by making simple modifications to the polarization controllers(PCs).Under a fixed pump power,only adjusting the PCs can obtain a composite modelocked state caused by the spontaneous switching of pulse states.By comparing and analyzing the polarization characteristics of the pulses in the two modelocked states,it is observed that the synchronization of the longitudinal modes corresponds to the complete synchronization of the orthogonal polarization components.Whereas,the composite modelocked of the longitudinal modes in partial synchronization corresponds to the partial synchronization of the orthogonal polarization components.It is proved experimentally that the orthogonal polarization component controls the synchronization between the longitudinal modes.This work is of significant importance to understanding the emergence of complex dynamics in modelocked lasers and developing stable laser dynamics technology.

关 键 词：锁模光纤激光器 非线性光学 非线性吸引子 光孤子 偏振 

分 类 号：TN248.1[电子电信—物理电子学]