Multiple wavelength frequency stabilization with a single transfer cavity for mercury optical lattice clock  

作　　者：Li Ma Qixin Liu Haiyang Song Jianfang Sun Zhen Xu 马莉;刘琪鑫;宋海阳;孙剑芳;徐震(Key Laboratory for Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Wangzhijiang Innovation Center for Laser,Aerospace Laser Technology and System Department,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]Key Laboratory for Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Wangzhijiang Innovation Center for Laser,Aerospace Laser Technology and System Department,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

出　　处：《Chinese Optics Letters》2024年第10期100-105,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11874371,91436105,and 12104474);the Shanghai Science and Technology Program,China(No.22ZR1471000);the Strategic Pilot Science and Technology Project of the Chinese Academy of Sciences,China(No.XDB21030200)。

摘　　要：A simple and robust multiple wavelength frequency stabilization system is demonstrated using a single transfer cavity and a1062-nm ultra-stable laser for all the lasers used in a mercury optical lattice clock.Offset sideband locking is employed to tune the laser frequency while dichroic mirrors and differentiated modulation frequencies are utilized for the Pound–Drever–Hall locking of four-color lasers.For the most demanding lasers at 1015 nm and 725 nm,the line width of the beat note is reduced to 27 kHz and 17 kHz,respectively.The frequency fluctuation for the transfer-locked 1015-nm laser is less than 10 kHz,which is much better than the lasers locked to an atomic spectrum.Using its high stability of 5×10^(-12)over100 s,the transfer-locked 1015-nm laser is employed for low-noise frequency modulated saturated absorption spectroscopy.This approach could also be used in various situations for the research of optical clocks,Rydberg atoms,laser cooling of molecules,and quantum computation with neutral atoms.

关 键 词：laser frequency stabilization Fabry–Perot cavity optical lattice clock Pound–Drever–Hall locking 

分 类 号：TN248[电子电信—物理电子学]