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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 3 — Feb. 1, 2007
  • pp: 307–309

Cavity-ringdown molecular spectroscopy based on an optical frequency comb at 1.45 1.65 μ m

Michael J. Thorpe, Darren D. Hudson, Kevin D. Moll, Jacob Lasri, and Jun Ye  »View Author Affiliations

Optics Letters, Vol. 32, Issue 3, pp. 307-309 (2007)

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Optical frequency comb-based cavity-ringdown spectroscopy has recently enabled high-sensitivity absorption detection of molecules over a broad spectral range. We demonstrate an improved system based on a mode-locked erbium-doped fiber laser source centered at 1.5 μ m , resulting in a spectrometer that is inexpensive, simple, and robust. It provides a very large spectral bandwidth ( 1.45 1.65 μ m ) for investigation of a wide variety of molecular absorptions. Strong molecular absorptions at 1.5 μ m allow for detection at sensitivities approaching the 1 part in 10 9 volume level. We provide a detailed description of our spectrometer and present measurements of the rovibrational spectra for CO, N H 3 , and C 2 H 2 with an absorption sensitivity of 2 × 10 8 cm 1 Hz 1 2 per detection channel.

© 2007 Optical Society of America

OCIS Codes
(140.3500) Lasers and laser optics : Lasers, erbium
(140.4050) Lasers and laser optics : Mode-locked lasers
(300.6390) Spectroscopy : Spectroscopy, molecular

ToC Category:

Original Manuscript: September 22, 2006
Revised Manuscript: October 20, 2006
Manuscript Accepted: October 23, 2006
Published: January 12, 2007

Michael J. Thorpe, Darren D. Hudson, Kevin D. Moll, Jacob Lasri, and Jun Ye, "Cavity-ringdown molecular spectroscopy based on an optical frequency comb at 1.45-1.65 μm," Opt. Lett. 32, 307-309 (2007)

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