两台独立飞秒激光器的脉冲序列与载波包络相位同步

发布时间：2018-03-26 06:47

本文选题：激光器　切入点：光纤飞秒激光器　出处：《中国激光》2016年08期

【摘要】：研究了两台独立运转的掺镱光纤飞秒激光器的脉冲序列与载波包络相位同步。使用平衡光学互相关的方法探测两台激光器的脉冲延迟,控制腔内高速压电陶瓷以锁定两台激光器的重复频率,得到两台激光器的剩余相对时间抖动为380as。不同的重复频率锁定带宽会对载波包络相位信号产生明显的影响,相比于使用压电陶瓷(低锁定带宽),使用电光调制器锁定重复频率(高锁定带宽)会使载波包络相位产生额外的噪声。将两台激光器的输出脉冲在空间上重合,入射进入平衡探测器,探测到两台激光器的相对载波包络频率信号。使用腔外声光调制器对两台激光器的载波包络相位进行锁定,得到两台激光器的剩余相位噪声为495mrad。锁定后观测到两激光器的光谱干涉,为相干脉冲合成奠定基础。
[Abstract]:The pulse sequence and carrier envelope phase synchronization of two Yb doped fiber femtosecond lasers are studied. The pulse delay of two Yb doped fiber femtosecond lasers is detected by balanced optical cross-correlation. By controlling the high speed piezoelectric ceramic in cavity to lock the repetition rate of two lasers, the residual relative time jitter of the two lasers is 380 as.Different repetition frequency locking bandwidth will have an obvious effect on the carrier envelope phase signal. Compared with the use of piezoelectric ceramics (low locking bandwidth), the use of electro-optic modulator locking repetition frequency (high locking bandwidth) causes additional noise in the carrier envelope phase. The incident enters the balance detector and detects the relative carrier envelope frequency signals of two lasers. The carrier envelope phase of the two lasers is locked using an external acousto-optic modulator. The residual phase noise of two lasers is 495mrad.Spectral interference of the two lasers is observed after locking, which lays the foundation for coherent pulse synthesis.
【作者单位】：天津大学精密仪器与光电子工程学院超快激光研究室光电信息技术科学教育部重点实验室;
【基金】：国家自然科学基金(11274239,61535009) 天津市应用基础与前沿技术研究计划(13JCQNJC01400) 强场激光物理国家重点实验室开放基金
【分类号】：TN248

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