被动锁模光纤激光器中窄带滤波器对多脉冲的影响  

Effect on Multi-Pulse of a Narrow-Band Filter in a Passively Mode-Locked Fiber Ring Laser

作　　者：罗智超[1] 罗爱平[1] 徐文成[1] 

机构地区：[1]华南师范大学信息光电子科技学院,广州510631

出　　处：《华南师范大学学报（自然科学版）》2014年第4期43-47,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11074078;61378036;61307058;11304101);广东省自然科学基金项目(S2013040016320)

摘　　要：研究了在被动锁模掺铒光纤环形激光器中加入窄带滤波器对多脉冲产生的影响.在激光器的腔内插入一个窄带光纤布拉格光栅(FBG),限制激射带宽,可以在低阈值的情况下产生多脉冲.多脉冲的个数取决于泵浦功率的设置,激光器输出脉冲的个数可以分立可调.多脉冲的混沌态数值模拟进一步证实了上述结果.窄带滤波器可以加强多脉冲的产生,这有助于进一步理解光纤激光器中多脉冲的形成机制.Multi-pulse generation based on a narrow-band filter in a passively mode-locked erbium-doped fiber ring laser is investigated experimentally. The low threshold multi-pulse is easily achieved by inserting a narrow-band Fiber Bragg Grating （FBG） filter into the laser ring cavity to limit the lasing bandwidth. Depending on the pump power settings, the number of output pulses canbe discretely tuned one by one. Moreover, the chaotic state of multi-pulse operation is also observed. The experimental results are further confirmed by the numerical simulations, which prove that a narrow-band filter could greatly enhance the multi-pulse generation.

关 键 词：被动锁模光纤激光器 多脉冲 窄带滤波器 

分 类 号：TN241[电子电信—物理电子学]