Open AccessDoppler-free dual-comb spectroscopy of Rb using optical-optical double resonance technique
Author(s) -
Akiko Nishiyama,
Shigeo Yoshida,
Yoshiaki Nakajima,
Hiroyuki Sasada,
K. Nakagawa,
Atsushi Onae,
Kaoru Minoshima
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.025894
Subject(s) - optics , spectroscopy , doppler effect , materials science , hyperfine structure , doppler broadening , spectral line , frequency comb , polarization (electrochemistry) , spectral resolution , physics , atomic physics , laser , chemistry , quantum mechanics , astronomy
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 5P 3/2 - 4D 5/2 , 4D 3/2 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.