基于覆石墨烯锥型光纤可饱和吸收体的掺铥光纤激光器  

Tm-doped fiber laser based on graphene-covered-microfiber saturable absorber

作　　者：王小发[1] 顾斌 WANG Xiaofa;GU Bin(School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Key Laboratory ofOptical Fiber Communication Technology,Chongqing Education Commission,Chongqing 400065,P.R.China)

机构地区：[1]重庆邮电大学光电工程学院,重庆高校光通信技术重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2020年第2期271-277,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(11304409);重庆市自然科学基金(CSTC2013jcyjA4004);重庆市教委科学技术研究项目(KJ1500422);重庆市科委一般项目(CSTC2018jcyjAX0585);重庆市科委重大产业专项(cstc2017zdcy-zdzxX0011)。

摘　　要：报道了一种基于覆石墨烯锥型光纤可饱和吸收体的掺铥光纤激光器。该激光器采用环形腔结构,利用"熔融拉锥"法制备锥型微纳光纤,采用化学气相沉积法制备石墨烯层,并将单层石墨烯覆于锥型微纳光纤上形成可饱和吸收体,利用石墨烯对光纤锥腰部位倏逝场的非线性吸收来实现锁模。通过调节激光器的泵浦功率(1~2.52 W),获得了多个工作状态的产生和演化过程,实验分别获得了连续激光(1~1.38 W)、调Q锁模脉冲(1.38~2.09 W)和稳定的连续锁模脉冲(2.09~2.52 W)3种不同的输出状态。结果表明,覆石墨烯锥型光纤可饱和吸收体能够使激光器实现稳定的锁模运行,研究结果对基于覆石墨烯锥型光纤可饱和吸收体的掺铥光纤激光器输出动力学特性研究具有一定的指导价值。In this paper,a thulium-doped fiber laser(TDFL)with a graphene-covered-microfiber(GCM)as saturable absorber(SA)is reported.The laser adopts a ring cavity structure,the micro-nano fiber is fabricated using the flame brushing method,A graphene layer is prepared by chemical vapor deposition and a monolayer of graphene is coated on the tapered micro-nano fiber to form a saturable absorber,which allows the interaction between light and graphene via evanescent field.By adjusting the pump power of the laser(1~2.52 W),the generation and evolution process of multiple working states were obtained.The experiment obtained continuous operation(1~1.38 W),Q-switched mode-locked pulse(1.38~2.09 W)and stable continuous mode-locked operation(2.09~2.52 W)are obtained respectively.The obtained results show that the graphene-covered-microfiber(GCM)saturable absorbers(SA)can enable the laser to achieve a stable mode-locking operation.The research results have a certain guiding value for the study of the output dynamics of erbium-doped fiber laser based on graphene-cone fiber-optic saturable absorber.

关 键 词：调Q锁模 连续波锁模 覆石墨烯锥型光纤 掺铥光纤激光器 

分 类 号：TN248[电子电信—物理电子学]