SESAM锁模全保偏皮秒脉冲光纤激光器输出特性  

Output Characteristics of SESAM Mode-locked All-polarization-maintaining(PM)Picosecond Fiber Laser

作　　者：王帅坤 仲莉[1] 林楠[1] 刘素平[1] 马骁宇[1] WANG Shuaikun;ZHONG Li;LIN Nan;LIU Suping;MA Xiaoyu(National Engineering Research Center for Optoelectronic Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院半导体研究所光电子器件国家工程研究中心,北京100083 [2]中国科学院大学材料科学与光电技术学院,北京100049

出　　处：《发光学报》2024年第1期149-156,共8页Chinese Journal of Luminescence

基　　金：国家重点研发计划(2022YFB4601201)。

摘　　要：搭建了基于半导体可饱和吸收镜(SESAM)锁模的全保偏皮秒脉冲光纤激光器,对比分析了以多量子阱和体材料作为可饱和吸收层的SESAM对锁模激光器输出特性的影响。实验结果表明,多量子阱和体材料SESAM均可实现稳定的自启动锁模。随着量子阱周期数的增加,SESAM调制深度增大,激光器输出脉冲宽度变窄,具有更高的输出功率和更大的锁模区间。但量子阱周期数过高的SESAM具有较大非饱和损耗,使得相同泵浦功率下输出功率降低。在相同调制深度下,体材料SESAM的非饱和损耗偏大,降低了输出功率和光光转化效率,但对脉冲的窄化作用更显著。SESAM对输出脉冲的波长和光谱宽度无显著影响,主要受光纤布拉格光栅(FBG)控制。本文对SESAM的设计与选型具有一定指导意义。An all-polarization-maintaining picosecond fiber laser mode-locked by a semiconductor saturable absorb-er mirror(SESAM)is constructed.The effects of different SESAM structure with multi-quantum well and bulk materi-al as saturable absorber layer on the output characteristics are analyzed and compared.The experimental results show that both the multi-quantum well and the bulk material SESAM can achieve stable self-starting mode-locking.The SESAM modulation depth increases with the number of quantum well periods,resulting in narrower laser output pulse width,higher output power,and a larger mode-locking range.However,the greater the number of quantum well periods,the more nonsaturable losses of the SESAM,and it will reduce the output power at the same pump pow-er.At the same modulation depth,bulk material SESAM has more nonsaturable losses,which will reduce the output power and optical to optical conversion efficiency,but it has a more significant effect on pulse narrowing.The wave-length and spectral width of the output pulses are not significantly affected by the SESAM,but they are primarily con-trolled by the fiber Bragg grating(FBG).This study provides valuable guidance for the design and the selection of the SESAM.

关 键 词：光纤激光器 半导体可饱和吸收镜 超短脉冲 输出特性 

分 类 号：TN248.1[电子电信—物理电子学]