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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 5 — Mar. 1, 2012
  • pp: 875–877

Chip-based frequency combs with sub-100 GHz repetition rates

Adrea R. Johnson, Yoshitomo Okawachi, Jacob S. Levy, Jaime Cardenas, Kasturi Saha, Michal Lipson, and Alexander L. Gaeta  »View Author Affiliations


Optics Letters, Vol. 37, Issue 5, pp. 875-877 (2012)
http://dx.doi.org/10.1364/OL.37.000875


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Abstract

By fabricating high- Q silicon-nitride spiral resonators, we demonstrate frequency combs spanning over 200 nm with free spectral ranges (FSRs) of 80, 40, and 20 GHz using cascaded four-wave mixing. We characterize the RF beat note for the 20 GHz FSR comb, and the measured linewidth of 3.6 MHz is consistent with thermal fluctuations in the resonator due to amplitude noise of the pump source. These combs represent an important advance towards developing a complementary metal-oxide-semiconductor (CMOS)-based system capable of linking the optical and electronic regimes.

© 2012 Optical Society of America

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(140.3948) Lasers and laser optics : Microcavity devices

ToC Category:
Nonlinear Optics

History
Original Manuscript: December 1, 2011
Revised Manuscript: January 20, 2012
Manuscript Accepted: January 20, 2012
Published: February 24, 2012

Citation
Adrea R. Johnson, Yoshitomo Okawachi, Jacob S. Levy, Jaime Cardenas, Kasturi Saha, Michal Lipson, and Alexander L. Gaeta, "Chip-based frequency combs with sub-100 GHz repetition rates," Opt. Lett. 37, 875-877 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-5-875

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