@article{oai:uec.repo.nii.ac.jp:00009255,
 author = {Nishiyama, Akiko and Nakajima, Yoshiaki and Nakagawa, Ken’ichi and Minoshima, Kaoru},
 issue = {7},
 journal = {Optics Express},
 month = {Apr},
 note = {We demonstrated Doppler-free two-photon absorption dual-comb spectroscopy of 5S1/2 - 5D5/2 and 5D3/2 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.},
 pages = {8957--8967},
 title = {Precise and highly-sensitive Doppler-free two-photon absorption dual-comb spectroscopy using pulse shaping and coherent averaging for fluorescence signal detection},
 volume = {26},
 year = {2018}
}