超稳激光技术及其在锶光钟研究中的实现

李烨; 林弋戈; 王强; 杨涛; 孙震; 卢炳坤; 方占军

doi:10.12338/j.issn.2096-9015.2020.9018

超稳激光技术及其在锶光钟研究中的实现

doi: 10.12338/j.issn.2096-9015.2020.9018

1.
中国计量科学研究院，北京 100029
2.
清华大学精密仪器系，北京 100084

基金项目: 国家重点研究发展计划(2016YFF0200201，2017YFA0304404)；国家自然科学基金资助项目(91736310)

详细信息

作者简介:
李烨(1980-)，中国计量科学研究院副研究员，研究方向：超稳激光，邮箱：yeli@nim.ac.cn

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出版历程
- 网络出版日期: 2021-05-28
- 刊出日期: 2021-06-24

Ultra-Stable Laser Technology and its Realization in Strontium Optical Lattice Clock

1.
National Institute of Metrology, Beijing 100029, China
2.
Department of Precision Instruments, Tsinghua University, Beijing 100084, China

摘要

摘要: 中国计量科学研究院于2008年、2011年和2018年先后研制了百赫兹、赫兹和亚赫兹量级的超稳激光系统。本文主要介绍各种指标的超稳激光实现的途径及条件，论述参考腔、快速反馈锁定技术及如何运用精密控制技术抑制外界环境对参考腔腔长的影响，获得10⁻¹⁵或更高频率稳定度的超稳激光。从实验上将半导体激光器稳定锁定到30 cm长的高精细度ULE参考腔上，实现了频率稳定度3×10⁻¹⁶的超稳激光。
- 超稳激光 /
- 参考腔 /
- 频率稳定度 /
- 线宽 /
- PDH技术
Abstract: National Institute of Metrology (NIM) has realized the ultra-stable laser systems of hundred Hz, Hz and sub Hz magnitudes in 2008, 2011, and 2018. This paper focuses on the methods and conditions for the realization of ultra-stable lasers of various indices, discusses the reference cavity, fast feedback locking technique, and precision control technique to suppress the influence of external environment on the length of the reference cavity, and obtain 10⁻¹⁵ or higher frequency stability of the ultra-stable laser. Experimentally, an external cavity diode laser (ECDL) is locked to the 30-cm-long high-finesse ULE reference cavity, and the frequency stability of 3×10⁻¹⁶is achieved.
- ultra-stable laser /
- reference cavity /
- frequency stability /
- linewidth /
- PDH technique

HTML全文

图 1 PDH稳频技术原理

P: 起偏器；EOM：电光相位调制器；PBS: 偏振分光镜；λ/4：四分之一波片；PD：高速光电探测器；DBM：双平衡混频器；LO：本振信号源；PS：移相器

Figure 1. The scheme of PDH technique

下载: 全尺寸图片幻灯片

图 2 30 cm长参考腔及底座

Figure 2. 30-cm-long ULE cavity and its supporting base

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图 3 容纳长参考腔的真空系统

Figure 3. The vacuum chamber with the long reference cavity

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图 4 分时自比较测量得到的频率稳定度

Figure 4. Frequency stability evaluation with the interleaved measurement

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参考文献(20)

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