基于模式选择耦合器的光纤模式可切换调Q激光器  

Fiber Mode Switchable Q-Switched Laser Based on Mode Selective Coupler

作　　者：程培康 石帆 王腾 庞拂飞[1] 曾祥龙[1] Cheng peikang;Shi Fan;Wang Teng;Pang Fufei;Zeng Xianglong(Institute for Advanced Comunication and Data Science,Key Lab of Specialty Fiber Optics and Optical Access Network,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Comtnunication,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学先进通信与数据科学研究院,特种光纤与光接入网重点实验室,特种光纤与先进通信国际合作联合实验室,上海200444

出　　处：《中国激光》2020年第12期1-7,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(91750108);高等学校学科创新引智计划(111)资助(D20031);上海高等学校特聘教授(东方学者)项目(16520720900)。

摘　　要：基于腔内的模式选择耦合器(MSC),报道了一种输出模式可切换的调Q脉冲掺铒光纤激光器。通过布拉格光栅和MSC的共同作用,实现输出波长的选择和不同模式间的转换。由于MSC具有模式分离特性且激光腔具有双支路输出配置,通过调整腔内损耗可以实现对激光输出不同模式间的切换,成功地观察到了同时具有线偏振模式(LP01模式和LP11模式)的双波长调Q脉冲输出,该模式可切换激光器可以应用在通信、粒子捕获等领域。Based on the mode selective coupler(MSC) in a cavity, a Q-switched pulsed erbium-doped fiber laser with switchable output modes is reported in this work. Through the joint action of the Bragg grating and MSC, the output wavelength selection and the conversion between different modes are realized. Because the MSC has mode separation characteristics and the laser cavity has a dual-branch output configuration, the laser output can be switched between different modes by adjusting the cavity loss. The dual wavelength Q-switched pulse output with linear polarization modes(LP01 mode and LP11 mode) is successfully observed. The laser with switchable output modes can be used in communication, particle trapping, and other fields.

关 键 词：激光器 调Q光纤激光器 双波长 可调横模 少模布拉格光栅 

分 类 号：TN248[电子电信—物理电子学] TN253