@article{oai:uec.repo.nii.ac.jp:00009417,
 author = {Nishiyama, Akiko and Nakajima, Yoshiaki and Nakagawa, Ken’ichi and Onae, Atsushi and Sasada, Hiroyuki and Minoshima, Kaoru},
 issue = {25},
 journal = {Optics Express},
 month = {Dec},
 note = {We apply an intensity-modulation technique to dual-comb spectroscopy to improve its detection sensitivity. The scheme is demonstrated via Doppler-free optical–optical double-resonance spectroscopy of Rb by modulating the intensity of a pump laser with frequencies set at rates 3 times lower and 50,000 times higher than the difference in the repetition rates of the two frequency combs. The signal-to-noise ratios are enhanced by 3 and 6 times for slow and fast modulations, respectively, compared to those of conventional dual-comb spectroscopy without any intensity modulation. The technique is widely applicable to pump-probe spectroscopy with dual-comb spectroscopy and provides high detection sensitivity.},
 pages = {37003--37011},
 title = {Optical–optical double-resonance dual-comb spectroscopy with pump-intensity modulation},
 volume = {27},
 year = {2019}
}