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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 14689–14702

Characterization of fiber-laser-based sub-Doppler NICE-OHMS for quantitative trace gas detection

Aleksandra Foltynowicz, Weiguang Ma, and Ove Axner  »View Author Affiliations

Optics Express, Vol. 16, Issue 19, pp. 14689-14702 (2008)

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The potential of fiber-laser-based sub-Doppler noise-immune cavity-enhanced optical heterodyne molecular spectrometry for trace gas detection is scrutinized. The non-linear dependence of the on-resonance sub-Doppler dispersion signal on the intracavity pressure and power is investigated and the optimum conditions with respect to these are determined. The linearity of the signal strength with concentration is demonstrated and the dynamic range of the technique is discussed. Measurements were performed on C2H2 at 1531 nm up to degrees of saturation of 100. The minimum detectable sub-Doppler optical phase shift was 5 × 10-11 cm-1 Hz-1/2, corresponding to a partial pressure of C2H2 of 1 × 10-12 atm for an intracavity pressure of 20 mTorr, and a concentration of 10 ppb at 400 mTorr.

© 2008 Optical Society of America

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(300.1030) Spectroscopy : Absorption
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6380) Spectroscopy : Spectroscopy, modulation
(300.6460) Spectroscopy : Spectroscopy, saturation

ToC Category:

Original Manuscript: July 8, 2008
Revised Manuscript: August 24, 2008
Manuscript Accepted: August 30, 2008
Published: September 3, 2008

Aleksandra Foltynowicz, Weiguang Ma, and Ove Axner, "Characterization of fiber-laser-based sub-Doppler NICE-OHMS for quantitative trace gas detection," Opt. Express 16, 14689-14702 (2008)

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