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Direct Kerr-frequency-comb atomic spectroscopy

Stern, Liron and Stone, Jordan R. and Kang, Songbai and Cole, Daniel C. and Suh, Myoung-Gyun and Fredrick, Connor and Newman, Zachary and Vahala, Kerry and Kitching, John and Diddams, Scott A. and Papp, Scott B. (2018) Direct Kerr-frequency-comb atomic spectroscopy. . (Unpublished)

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Microresonator-based soliton frequency combs - microcombs - have recently emerged to offer low-noise, photonic-chip sources for optical measurements. Owing to nonlinear-optical physics, microcombs can be built with various materials and tuned or stabilized with a consistent framework. Some applications require phase stabilization, including optical-frequency synthesis and measurements, optical-frequency division, and optical clocks. Partially stabilized microcombs can also benefit applications, such as oscillators, ranging, dual-comb spectroscopy, wavelength calibration, and optical communications. Broad optical bandwidth, brightness, coherence, and frequency stability have made frequency-comb sources important for studying comb-matter interactions with atoms and molecules. Here, we explore direct microcomb atomic spectroscopy, utilizing a cascaded, two-photon 1529-nm atomic transition of rubidium. Both the microcomb and the atomic vapor are implemented with planar fabrication techniques to support integration. By fine and simultaneous control of the repetition rate and carrier-envelope-offset frequency of the soliton microcomb, we obtain direct sub-Doppler and hyperfine spectroscopy of the 4^2D_(5/2) manifold. Moreover, the entire set of microcomb modes are stabilized to this atomic transition, yielding absolute optical-frequency fluctuations of the microcomb at the kilohertz-level over a few seconds and < 1 MHz day-to-day accuracy. Our work demonstrates atomic spectroscopy with microcombs and provides a rubidium-stabilized microcomb laser source, operating across the 1550 nm band for sensing, dimensional metrology, and communication.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Cole, Daniel C.0000-0002-6360-1319
Suh, Myoung-Gyun0000-0002-9527-0585
Fredrick, Connor0000-0002-0560-1433
Vahala, Kerry0000-0003-1783-1380
Diddams, Scott A.0000-0002-2144-0764
Additional Information:We thank Su-Peng Yu and Matthew Hummon for comments on the manuscript. The authors would like to acknowledge the Kavli Nanoscience Institute. This work is a contribution of the US government and is not subject to copyright in the United States of America.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Kavli Nanoscience InstituteUNSPECIFIED
Record Number:CaltechAUTHORS:20190429-145001580
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95080
Deposited By: Tony Diaz
Deposited On:29 Apr 2019 21:54
Last Modified:02 Jun 2023 00:44

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