An All-Polarization-Maintaining Multi-Branch Optical Frequency Comb for Highly Sensitive Cavity Ring-Down Spectroscopy  

作　　者：Kai Ning Lei Hou Song-Tao Fan Lu-Lu Yan Yan-Yan Zhang Bing-Jie Rao Xiao-Fei Zhang Shou-Gang Zhang Hai-Feng Jiang 宁凯;侯磊;樊松涛;闫露露;张颜艳;饶冰洁;张晓斐;张首刚;姜海峰(Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;School of Astronomy and Space Sciences,University of Chinese Academy of Sciences,Xi’an 710069,China;Institute of Photonics and Photon-Technology,Northwest University,Xi’an 710069,China)

机构地区：[1]Key Laboratory of Time and Frequency Primary Standards,National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China [2]School of Astronomy and Space Sciences,University of Chinese Academy of Sciences,Xi’an 710069,China [3]Institute of Photonics and Photon-Technology,Northwest University,Xi’an 710069,China

出　　处：《Chinese Physics Letters》2020年第6期26-30,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.61825505 and 91536217)。

摘　　要：We demonstrate a multi-branch all polarization-maintaining Er:fiber frequency comb with five application ports for precise measurement of atomic/molecular transition frequencies in the near-infrared region.A fully stabilized Er:fiber frequency comb with a nonlinear amplifying loop mirror is achieved.The in-loop relative instability of stabilized carrier-envelope-offset frequency is 5.6×10-18 at 1 s integration time,while that of the repetition rate is well below 1.8×10-12 limited by the measurement noise floor of the commercial frequency counter.Five application ports are individually optimized for applications with different wavelengths(1064 nm,1083 nm,1380 nm,1637 nm and 1750 nm).The beat note between the optical frequency comb and continuous laser exhibits the signal-to-noise ratio of at least 30 dB at a resolution bandwidth of 100 kHz.The in-loop frequency instability of the comb is evaluated to be good enough for measurement of rotation-resolved transitions of molecules below 1 kHz resolution.

关 键 词：STABILIZED POLARIZATION HIGHLY 

分 类 号：O439[机械工程—光学工程]