锁模掺镱光纤激光器时间抖动的控制和优化  

Timing jitter control and optimization of mode-locked Yb-fiber lasers

作　　者：曹新如 顾晓蓉[1] 黎遥 陈海东 CAO Xinru;GU Xiaorong;LI Yao;CHEN Haidong(College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Electronic Science and Engineerings Nanjing University,Nanjing 210023,China)

机构地区：[1]南京航空航天大学理学院,南京211106 [2]南京大学电子科学与工程学院,南京210023

出　　处：《激光杂志》2021年第7期13-17,共5页Laser Journal

基　　金：国家自然科学基金(No.61805116);江苏省自然科学基金(No.BK20180056)。

摘　　要：低时间抖动的光纤激光器由于结构紧凑、输出稳定、造价低等优点,被广泛应用于远程同步、精密测距、光子模数转换等领域。实验中搭建了两台重复频率均为85 MHz的基于NPR(Nonlinear Polarization Rotation)锁模的掺镱光纤激光器,通过缩短被动光纤、减小腔内损耗以及色散管理等方式,实现了脉时间抖动的控制与优化。采用平衡光学互相关方法测量了激光器从10 kHz到42.5 MHz频率范围内的积分时间抖动值仅为34 as。Fiber lasers with low timing jitter are widely used in remote synchronization,precise ranging,photonic analog-to-digital conversion and other fields due to their compact size,stable performance and low cost.In the experiment,we have built two ytterbium-doped(Yb-)fiber lasers mode-locked by nonlinear polarization rotation(NPR)with repetition rates of 85 MHz.By shortening the passive fiber,reducing the cavity loss and managing the intra-cavity dispersion,we have optimized the timing jitter of the tested laser.The balanced optical cross-correlation method is introduced to measure the timing jitter of the mode-locked Yb-fiber laser.The achieved timing jitter is measured to be34 attoseconds integrated from 10 k Hz to 42.5 MHz offset frequency.

关 键 词：激光器 时间抖动 超快激光 平衡光学互相关 

分 类 号：TN248[电子电信—物理电子学]