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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 8 — Apr. 15, 2007
  • pp: 988–990

Frequency-comb-referenced quantum-cascade laser at 4.4 μ m

S. Bartalini, P. Cancio, G. Giusfredi, D. Mazzotti, P. De Natale, S. Borri, I. Galli, T. Leveque, and L. Gianfrani  »View Author Affiliations


Optics Letters, Vol. 32, Issue 8, pp. 988-990 (2007)
http://dx.doi.org/10.1364/OL.32.000988


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Abstract

We report what we believe to be the first absolute frequency measurement performed using a quantum-cascade laser (QCL) referenced to an optical frequency comb synthesizer (OFCS). A QCL at 4.43 μ m has been used for producing near-infrared radiation at 858 nm by means of sum-frequency generation with a Nd : YAG source in a periodically poled lithium niobate nonlinear crystal. The absolute frequency of the QCL source has been measured by detecting the beat note between the sum frequency and a diode laser at the same wavelength, while both the Nd : YAG and the diode laser were referenced to the OFCS. Doppler-broadened line profiles of CO 2 13 molecular transitions have been recorded with such an absolute frequency reference.

© 2007 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(190.2620) Nonlinear optics : Harmonic generation and mixing
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:
Spectroscopy

History
Original Manuscript: November 27, 2006
Revised Manuscript: January 15, 2007
Manuscript Accepted: January 25, 2007
Published: March 19, 2007

Citation
S. Bartalini, P. Cancio, G. Giusfredi, D. Mazzotti, P. De Natale, S. Borri, I. Galli, T. Leveque, and L. Gianfrani, "Frequency-comb-referenced quantum-cascade laser at 4.4 μm," Opt. Lett. 32, 988-990 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-8-988


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