Doppler-free dual-comb spectroscopy of Rb using optical-optical double resonance technique

Akiko Nishiyama, Satoru Yoshida, Yoshiaki Nakajima, Hiroyuki Sasada, Ken'ichi Nakagawa, Atsushi Onae, Kaoru Minoshima

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


We present a Doppler-free high-resolution dual-comb spectroscopy technique in which a dual-comb system is employed to perform optical-optical double-resonance (OODR) spectroscopy. In our experimental study, Doppler-free high-resolution and high-frequency-accuracy broadband measurements were realized using the proposed OODR dual-comb spectroscopic technique, which does not require high-power-per-mode frequency combs. We observed fully resolved hyperfine spectra of 5P3/2 - 4D5/2, 4D3/2 transitions of Rb at 1530 nm and precisely determined the absolute frequencies of the transitions, with an uncertainty of less than 1 MHz. The variations of the OODR spectral line shapes due to power broadening and alignment and the effects of polarization on the dual-comb OODR spectra were also analyzed. This study provides a widely applicable technique for Doppler-free dual-comb spectroscopy of various gaseous species.

Original languageEnglish
Pages (from-to)25894-25904
Number of pages11
JournalOptics Express
Issue number22
Publication statusPublished - 2016 Oct 31

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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