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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 5 — Mar. 1, 2005
  • pp: 570–572

Demonstration of a HeNe/CH4-based optical molecular clock

Seth M. Foreman, Adela Marian, Jun Ye, Evgeny A. Petrukhin, Mikhail A. Gubin, Oliver D. Mücke, Franco N. C. Wong, Erich P. Ippen, and Franz X. Kärtner  »View Author Affiliations


Optics Letters, Vol. 30, Issue 5, pp. 570-572 (2005)
http://dx.doi.org/10.1364/OL.30.000570


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Abstract

We implement a simple optical clock based on the F2(²) [P(7), nu3] optical transition in methane. A single femtosecond laser's frequency comb undergoes difference frequency generation to provide an IR comb at 3.39 µm with a null carrier-envelope offset. This IR comb provides a phase-coherent link between the 88-THz optical reference and the rf repetition rate. Comparison of the repetition rate signal with a second femtosecond comb stabilized to molecular iodine shows an instability of 1.2 × 10^-13 at 1 s, limited by microwave detection of the repetition rates. The single-sideband phase noise of the microwave signal, normalized to a carrier frequency of 1 GHz, is below -93 dBc/Hz at 1-Hz offset.

© 2005 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7160) Ultrafast optics : Ultrafast technology

Citation
Seth M. Foreman, Adela Marian, Jun Ye, Evgeny A. Petrukhin, Mikhail A. Gubin, Oliver D. Mücke, Franco N. C. Wong, Erich P. Ippen, and Franz X. Kärtner, "Demonstration of a HeNe/CH4-based optical molecular clock," Opt. Lett. 30, 570-572 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-5-570

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