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.
作者
曹新如
顾晓蓉
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)
出处
《激光杂志》
CAS
北大核心
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)。
关键词
激光器
时间抖动
超快激光
平衡光学互相关
lasers
timing jitter
ultrafast optics
balanced optical cross-correlation
