Different ways to active optical frequency standards

8th Symposium on Frequency Standards and Metrology 2015

Pan, Duo^1 ; Xue, Xiaobo^1 ; Zhang, Xiaogang^1 ; Chen, Jingbiao^1

State Key Laboratory of Advanced Optical Communication System and Network, School of Electronics Engineering and Computer Science, Peking University, Beijing

100871, China^1

关键词: Atomic transition;    Coherent stimulated emission;    Narrow-line width;    Optical clocks;    Optical frequency standard;    Peking University;    Phase coherence;    Population inversions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012028/pdf
DOI  :  10.1088/1742-6596/723/1/012028

来源: IOP

【 摘 要 】

Active optical frequency standard, or active optical clock, is a new concept of optical frequency standard, where a weak feedback with phase coherence information in optical bad-cavity limitation is formed, and the continuous self-sustained coherent stimulated emission between two atomic transition levels with population inversion is realized. Through ten years of both theoretical and experimental exploration, the narrow linewidth and suppression of cavity pulling effect of active optical frequency standard have been initially proved. In this paper, after a simple review, we will mainly present the most recent experimental progresses of active optical frequency standards in Peking University, including 4-level cesium active optical frequency standards and active Faraday optical frequency standards. The future development of active optical frequency standards is also discussed.