Doppler-free dual-comb spectroscopy of Rb using optical-optical double resonance technique.
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, 4D3/2transitions 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.
Akiko
A
Nishiyama
Satoru
S
Yoshida
Yoshiaki
Y
Nakajima
Hiroyuki
H
Sasada
Ken'ichi
K
Nakagawa
Atsushi
A
Onae
Kaoru
K
Minoshima