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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 1 — Jan. 1, 2005
  • pp: 32–34

Coherent multiwave heterodyne frequency measurement of a far-infared laser by means of a femtosecond laser comb

N. Beverini, G. Carelli, A. De Michele, E. Maccioni, B. Nyushkov, F. Sorrentino, and A. Moretti  »View Author Affiliations


Optics Letters, Vol. 30, Issue 1, pp. 32-34 (2005)
http://dx.doi.org/10.1364/OL.30.000032


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Abstract

We demonstrate the possibility of using a femtosecond laser to measure with high accuracy the frequency of a far-infrared (FIR) monochromatic source, such as an optically pumped molecular laser, by generating in a suitable mixer a signal in the radio-frequency region at the frequency difference between n steps of a femtosecond comb and the FIR source. All the couples of modes lying a distance of n steps from one another contribute coherently to the heterodyne signal. The technique has been tested up to 670GHz.

© 2005 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.4050) Lasers and laser optics : Mode-locked lasers
(260.3090) Physical optics : Infrared, far

Citation
N. Beverini, G. Carelli, A. De Michele, E. Maccioni, B. Nyushkov, F. Sorrentino, and A. Moretti, "Coherent multiwave heterodyne frequency measurement of a far-infared laser by means of a femtosecond laser comb," Opt. Lett. 30, 32-34 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-1-32

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