Precise and highly-sensitive Doppler-free two-photon absorption dual-comb spectroscopy using pulse shaping and coherent averaging for fluorescence signal detection

被引：16
|
作者：
Nishiyama, Akiko [1 ,2 ,3 ]
Nakajima, Yoshiaki [1 ,2 ]
Nakagawa, KeN'Ichi [1 ]
Minoshima, Kaoru [1 ,2 ]
机构：
[1] Univ Electrocommun UEC, Grad Sch Informat, Dept Engn Sci, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
[2] ERATO MINOSHIMA Intelligent Opt Synthesizer IOS P, Japan Sci & Technol Agcy JST, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
[3] JSPS, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan
来源：
OPTICS EXPRESS | 2018年 / 26卷 / 07期
基金：
日本科学技术振兴机构;
关键词：
FREQUENCY-COMB; TRANSITION; RESOLUTION;
D O I：
10.1364/OE.26.008957
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrated Doppler-free two-photon absorption dual-comb spectroscopy of 5S(1/2) - 5D(5/2) and 5D(3/2) transitions of Rb. We employed simple pulse-shaping of the dual-comb source and eliminated Doppler-broadening backgrounds, which cause fitting errors of the Doppler-free signals. Moreover, to improve sensitivity, we investigated the coherence in dual-comb fluorescence signals and the coherent averaging method was applied to fluorescence dual-comb detection for the first time. The detection sensitivity was significantly improved by coherent averaging to reduce the noise floor. Observed Doppler-free spectra was fitted to Voigt profiles and we performed absolute frequency determination with a precision of about 100 kHz. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：8957 / 8967
页数：11
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