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Optica

Optica

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  • Editor: Alex Gaeta
  • Vol. 1, Iss. 1 — Jul. 2014
  • pp: 10–14

Microresonator frequency comb optical clock

Scott B. Papp, Katja Beha, Pascal Del’Haye, Franklyn Quinlan, Hansuek Lee, Kerry J. Vahala, and Scott A. Diddams  »View Author Affiliations


Optica, Vol. 1, Issue 1, pp. 10-14 (2014)
http://dx.doi.org/10.1364/OPTICA.1.000010


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Abstract

Optical frequency combs serve as the clockwork of optical clocks, which are now the best time-keeping systems in existence. The use of precise optical time and frequency technology in various applications beyond the research lab remains a significant challenge, but one that integrated microresonator technology is poised to address. Here, we report a silicon-chip-based microresonator comb optical clock that converts an optical frequency reference to a microwave signal. A comb spectrum with a 25 THz span is generated with a 2 mm diameter silica disk and broadening in nonlinear fiber. This spectrum is stabilized to rubidium frequency references separated by 3.5 THz by controlling two teeth 108 modes apart. The optical clock’s output is the electronically countable 33 GHz microcomb line spacing, which features stability better than the rubidium transitions by the expected factor of 108. Our work demonstrates the comprehensive set of tools needed for interfacing microcombs to state-of-the-art optical clocks.

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(230.4910) Optical devices : Oscillators
(140.3945) Lasers and laser optics : Microcavities

History
Original Manuscript: April 4, 2014
Revised Manuscript: June 16, 2014
Manuscript Accepted: June 17, 2014
Published: July 22, 2014

Citation
Scott B. Papp, Katja Beha, Pascal Del’Haye, Franklyn Quinlan, Hansuek Lee, Kerry J. Vahala, and Scott A. Diddams, "Microresonator frequency comb optical clock," Optica 1, 10-14 (2014)
http://www.opticsinfobase.org/optica/abstract.cfm?URI=optica-1-1-10


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