Precise and highly-sensitive Doppler-free two-photon absorption dual-comb spectroscopy using pulse shaping and coherent averaging for fluorescence signal detection
作者： Akiko Nishiyama , Yoshiaki Nakajima , Ken’ichi Nakagawa , Kaoru Minoshima
DOI: 10.1364/OE.26.008957
关键词:
摘要: We demonstrated Doppler-free two-photon absorption dual-comb spectroscopy of 5S1/2 - 5D5/2 and 5D3/2 transitions Rb. employed simple pulse-shaping the source eliminated Doppler-broadening backgrounds, which cause fitting errors signals. Moreover, to improve sensitivity, we investigated coherence in fluorescence signals coherent averaging method was applied detection for first time. The sensitivity significantly improved by reduce noise floor. Observed spectra fitted Voigt profiles performed absolute frequency determination with a precision about 100 kHz.
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