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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 7 — Jul. 16, 2007

Femtosecond laser Fourier transform absorption spectroscopy

Julien Mandon, Guy Guelachvili, Nathalie Picqué, Frédéric Druon, and Patrick Georges  »View Author Affiliations


Optics Letters, Vol. 32, Issue 12, pp. 1677-1679 (2007)
http://dx.doi.org/10.1364/OL.32.001677


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Abstract

A femtosecond mode-locked laser is used for what is believed to be the first time as a broadband infrared source for high-resolution Fourier transform absorption spectroscopy. A demonstration is made with a Cr 4 + : YAG laser. The entire ν 1 + ν 3 vibration–rotation band region of acetylene, observed after passing through a single-pass 80 - cm -long cell, is simultaneously recorded between 1480 and 1600 nm , in 7.9 s with a signal-to-noise ratio equal to 1000. Two hot bands of the most abundant acetylene isotopologue and the ν 1 + ν 3 band of the C 12 13 C H 2 are also present. Replacement of the usual conventional tungsten lamp by the bright laser source reduces by about a factor of 150 the recording time needed to get similar results. The noise equivalent absorption coefficient at 1 s averaging is equal to 7 × 10 7 cm 1 Hz 1 2 per spectral element.

© 2007 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.4050) Lasers and laser optics : Mode-locked lasers
(140.7090) Lasers and laser optics : Ultrafast lasers
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 3, 2007
Revised Manuscript: April 11, 2007
Manuscript Accepted: April 17, 2007
Published: June 5, 2007

Virtual Issues
Vol. 2, Iss. 7 Virtual Journal for Biomedical Optics

Citation
Julien Mandon, Guy Guelachvili, Nathalie Picqué, Frédéric Druon, and Patrick Georges, "Femtosecond laser Fourier transform absorption spectroscopy," Opt. Lett. 32, 1677-1679 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-32-12-1677

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