将多激光频率锁定到精密波长计：在冷原子中的应用。

Locking Multi-Laser Frequencies to a Precision Wavelength Meter: Application to Cold Atoms.

作者信息

Kim Junwoo, Kim Keumhyun, Lee Dowon, Shin Yongha, Kang Sungsam, Kim Jung-Ryul, Choi Youngwoon, An Kyungwon, Lee Moonjoo

机构信息

Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.

Center for Molecular Spectroscopy and Dynamics, Institute for Basic Science (IBS), 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea.

出版信息

Sensors (Basel). 2021 Sep 18;21(18):6255. doi: 10.3390/s21186255.

DOI:10.3390/s21186255

PMID:34577462

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8473145/

Abstract

We herein report a simultaneous frequency stabilization of two 780-nm external cavity diode lasers using a precision wavelength meter (WLM). The laser lock performance is characterized by the Allan deviation measurement in which we find σy=10-12 at an averaging time of 1000 s. We also obtain spectral profiles through a heterodyne spectroscopy, identifying the contribution of white and flicker noises to the laser linewidth. The frequency drift of the WLM is measured to be about 2.0(4) MHz over 36 h. Utilizing the two lasers as a cooling and repumping field, we demonstrate a magneto-optical trap of 87Rb atoms near a high-finesse optical cavity. Our laser stabilization technique operates at broad wavelength range without a radio frequency element.

摘要

我们在此报告了使用精密波长计（WLM）对两台780纳米外腔二极管激光器进行同时频率稳定。通过艾伦偏差测量来表征激光锁定性能，我们发现在平均时间为1000秒时，σy = 10^-12。我们还通过外差光谱法获得了光谱轮廓，确定了白噪声和闪烁噪声对激光线宽的贡献。测量得出WLM在36小时内的频率漂移约为2.0(4)兆赫兹。利用这两台激光器作为冷却和再泵浦场，我们展示了在高精细度光学腔附近对87Rb原子的磁光阱。我们的激光稳定技术在宽波长范围内运行，无需射频元件。