高次谐波锁模飞秒掺镱光纤激光器的噪声情况  

Noise of high-order harmonic mode-locked femtosecond Yb fiber laser

作　　者：柏汉泽 钟艺峰 任炽明 黄俊杰 田劲东[2] 熊德平[3] 孙敬华 Bai Hanze;Zhong Yifeng;Ren Chiming;Huang Junjie;Tian Jindong;Xiong Deping;Sun Jinghua(School of Electronic Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]东莞理工学院电子工程与智能化学院,广东东莞523808 [2]深圳大学物理与光电工程学院,广东深圳518060 [3]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《红外与激光工程》2022年第8期166-172,共7页Infrared and Laser Engineering

基　　金：广东省基础与应用基础研究基金区域联合基金重点项目(2020 B1515120041);广东省普通高校省级重大科研项目(2018 KZDXM067)。

摘　　要：高重复频率的飞秒激光在高速激光测距和三维成像等领域有着非常重要的作用。其中基于飞秒光纤激光器的高次谐波锁模是获得GHz量级以上高重复频率脉冲的重要手段之一。基于含腔内光栅对色散补偿的非线性偏振旋转(NPR)锁模的掺镱(Yb)光纤激光器,在180 mW泵浦光时获得了稳定的143 MHz基频锁模脉冲序列,当泵浦光功率升至1 W时获得了最高20次谐波(2.86 GHz)锁模脉冲序列输出。系统地对比研究了基频锁模与高次谐锁模状态下,脉冲重复频率精密锁定后的艾伦偏差和相位噪声,7次谐波锁模状态下重复频率锁定精度能够保持在10^(−13) Hz@1 s的稳定度,为高次谐波锁模飞秒激光脉冲序列用于精密测量提供了实验依据。Femtosecond lasers with high repetition rates play important roles in advanced manufacturing,such as high-speed laser ranging and three-dimensional imaging.Among them,high-order harmonic mode-locking based on femtosecond fiber lasers is one of the important methods to obtain high repetition rates above GHz.Based on a nonlinear polarization rotation(NPR)mode-locked Ytterbium(Yb)fiber laser with dispersion compensation from intra-cavity grating,a stable 143 MHz fundamental frequency mode-locked pulse sequence was obtained when the pump light was 180 mW.When the pump power was increased to 1 W,the highest 20th harmonic(2.86 GHz)mode-locked pulse train was obtained.The Allen deviation and phase noise of the output pulse repetition rates of the Yb fiber laser were studied systematically when it was running at high harmonic mode-locking and fundamental mode-locking respectively.The repetition frequency locking accuracy can be maintained at a stability of 10^(-13) Hz@1 s in the 7th harmonic mode locking state.This study provides an experimental basis for high harmonic mode-locked femtosecond laser pulse sequence to be used for precise measurement.

关 键 词：高次谐波锁模 飞秒掺镱光纤激光器 脉冲重复频率 时间抖动 相位噪声 

分 类 号：TN248[电子电信—物理电子学]