2μm可调谐高重复频率主动锁模光纤激光器  

Tunable high repetition rate actively mode-locked fiber laser at 2 μm

作　　者：马万卓 王天枢[1,2] 王富任 王诚博 张靓 姜会林[1,2] Ma Wanzhuo;Wang Tianshu;Wang Furen;Wang Chengbo;Zhang Jing;Jiang Huilin(National and Local Joint Engineering Research Center of Space Optoelectronics Technology,Changchun University of Science and Technology,Changchun,Jilin 130022,China;College of Opto-Electronic Engineering,Changchun University of Science and Technology,Changchun,Jilin 130022,China;College of Science,Changchun University of Science and Technology,Changchun,Jilin 130022,China)

机构地区：[1]长春理工大学空间光电技术国家与地方联合工程研究中心,吉林长春130022 [2]长春理工大学光电工程学院,吉林长春130022 [3]长春理工大学理学院,吉林长春130022

出　　处：《光电工程》2018年第10期170660-170665,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(91338116)~~

摘　　要：本文报道了一种2μm波段可调谐主动锁模光纤激光器,增益介质为4m铥钬共掺光纤。主动锁模脉冲采用强度调制方式实现,调制信号为高频正弦信号。可调谐窄带宽光滤波器用来窄化激光线宽,抑制噪声,同时可实现波长调谐。实现了稳定的2.2 GHz重复频率主动锁模脉冲输出,对应649阶谐波锁模脉冲序列,脉冲宽度约为200 ps,频谱信噪比可达68 dB,激光线宽为0.05 nm,光谱调谐范围为1907 nm～1927 nm。We demonstrate a tunable actively mode-locked fiber laser at 2μm band.A segment of 4 m Tm-Ho-co-doped fiber is used as gain medium.Active mode locking pulse is realized by using intensity modulation and the signal source is high frequency sinusoidal signal.A tunable narrow bandwidth optical filter is used to narrow laser linewidth,suppress noise and achieve wavelength tuning.Stable actively mode-locked pulses with up to 2.2 GHz repetition rate is obtained,corresponding to 649 order harmonic mode-locked pulse train.The pulse width is about 200 ps.The signal-to-noise ratio of RF spectrum is 68 dB.The optical tuning range is 1907 nm^1927 nm.

关 键 词：光纤激光器 主动锁模 铥钬共掺光纤 高重复频率 可调谐激光 

分 类 号：TN248[电子电信—物理电子学] TN253