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Conference on Lasers and Electro-Optics

Direct Kerr-frequency-comb atomic stabilization

Liron Stern, Jordan R. Stone, Songbai Kang, Daniel C. Cole, John E. Kitching, Scott A. Diddams, Scott B. Papp

Published Jan 1, 2018• 5 citations
Publisher

Abstract

We experimentally demonstrate direct Kerr-microresonator frequency-comb atomic spectroscopy, utilizing a cascaded two-photon 1529-nm transition in a rubidium micro-machined vapor cell. The demonstration is a path for compact atomic frequency references and multiphoton comb-atom interactions.
DOI
10.1364/cleo_qels.2018.fw3e.5

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We present the observation of the Rb two-photon spectrum directly excited by an Er:fiber laser comb in a hot atomic vapor system. The influences of the atomic velocity distribution on direct and sequential two-photon transitions are discussed respectively and a combination of corresponding spectral control techniques is developed to eliminate the Doppler broadening background. A direct frequency comb spectroscopy is obtained with high-resolution two-photon transition lines. These techniques would benefit spectroscopy measurement in hot atomic vapor systems, and pave the way for establishing a high-stability optical frequency comb in 1.5 $\ensuremath{\mu}$m optical communication bands based on the Rb two-photon transitions.
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