Optical–optical double-resonance dual-comb spectroscopy with pump-intensity modulation

• DOI: 10.1364/oe.27.037003
• Publication Date: 2019-12-05T16:10:53Z
• Authors: Akiko Nishiyama; Yoshiaki Nakajima; Ken’ichi Nakagawa; Atsushi Onae; Hiroyuki Sasada; Kaoru Minoshima
• Keywords: Modulation (music); Intensity

We apply an intensity-modulation technique to dual-comb spectroscopy improve its detection sensitivity. The scheme is demonstrated via Doppler-free optical-optical double-resonance of Rb by modulating the intensity a pump laser with frequencies set at rates 3 times lower and 50,000 higher than difference in repetition two frequency combs. signal-to-noise ratios are enhanced 6 for slow fast modulations, respectively, compared those conventional without any modulation. widely applicable pump-probe provides high