Add to BibSonomy
Abstract
Laser frequency stabilization plays an important role in high-precision spectroscopic measurements. Since high-accuracy commercial wavemeters became available, wavemeter-based frequency stabilization has found a broad application due to its convenience, flexibility, and wide applicability. However, such stabilization schemes frequently suffer from long-term drift, since the accuracy of the wavelength measurement of a wavemeter is affected by ambient temperature fluctuation. In this work, we demonstrate that such long-term drift can be suppressed by regularly calibrating the frequency of a wavemeter-locked laser utilizing an optical frequency comb, which has much better long-term stability. Under this dual-referenced locking scheme, the Allan deviation is reduced to 3.5 E-12 at 4000 s for a fiber laser operated at 548 nm, which when used in the optical Ramsey spectroscopic measurement of $^7{{\rm Li}^ +}$, reduces the standard deviation by as much as 40%, compared to the case when only wavemeter locking is applied.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Fei Zi, Xuejian Wu, Weicheng Zhong, Richard H. Parker, Chenghui Yu, Simon Budker, Xuanhui Lu, and Holger Müller
Appl. Opt. 56(10) 2649-2652 (2017)
Cheng Ci, Xuesong Zhang, Xinran Li, Xing Chen, Yifan Cui, Yingxin Zhao, Bo Liu, and Hong Wu
Appl. Opt. 55(24) 6747-6751 (2016)
J. K. Shaw, C. Fredrick, and S. A. Diddams
OSA Continuum 2(11) 3262-3271 (2019)