快速傅里叶变换在阿秒束线光路稳定控制中的应用
ACTA PHYSICA SINICA（2019）
Abstract
本文报道了将快速傅里叶变换算法应用于抽运探测系统和倍频光谱干涉系统(f-2f interferometry),对光路进行反馈控制的原理和结果,分别得到相对臂长抖动均方根1.24 nm(对应时间为4.1 as)的抽运-探测光路锁定和积分时间3 ms下相对相移均方根227 mrad的慢环载波包络相位(carrier envelop phase,CEP)锁定.这样的锁定精度可以保证产生阿秒脉冲的飞秒激光脉冲拥有稳定的CEP,并且为后续阿秒抽运探测提供了稳定的实验条件.
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Key words
fast Fourier transform,arm length locking,carrier envelope phase locking
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