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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 10 — Oct. 1, 2012
  • pp: 2980–2989

Speed-dependent effects in dispersion mode of detection and in noise-immune cavity-enhanced optical heterodyne molecular spectrometry: experimental demonstration and validation of predicted line shape

Junyang Wang, Patrick Ehlers, Isak Silander, and Ove Axner  »View Author Affiliations


JOSA B, Vol. 29, Issue 10, pp. 2980-2989 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002980


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Abstract

Speed-dependent effects (SDEs) in both the absorption and dispersion modes of detection have been detected and scrutinized by the noise-immune cavity-enhanced optical heterodyne molecular spectrometry (NICE-OHMS) technique. The present paper achieves four objectives: (i) it provides the first demonstration of SDEs detected in dispersion, (ii) it validates the expression for a speed-dependent Voigt (SDV) dispersion line-shape function that is derived in an accompanying paper, (iii) it illustrates the influence of SDEs on the NICE-OHMS technique, and (iv) it gives the first experimental comparison of SDEs for the absorption and dispersion modes of detection. Experiments were performed using an isolated transition in the v1+v3+v41-v41 band of acetylene [Pe(33) at 6439.371cm1] in the 100–250 Torr range at room temperature. It is shown that SDEs appear in both the absorption and dispersion modes of detection, that they can be well described by the suggested SDV dispersion line-shape function, and that they need to be taken into account if NICE-OHMS signals detected under optimal pressures are to be properly assessed.

© 2012 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(260.2030) Physical optics : Dispersion
(300.1030) Spectroscopy : Absorption
(300.6310) Spectroscopy : Spectroscopy, heterodyne
(300.6360) Spectroscopy : Spectroscopy, laser

ToC Category:
Spectroscopy

History
Original Manuscript: May 31, 2012
Revised Manuscript: August 9, 2012
Manuscript Accepted: August 24, 2012
Published: September 28, 2012

Citation
Junyang Wang, Patrick Ehlers, Isak Silander, and Ove Axner, "Speed-dependent effects in dispersion mode of detection and in noise-immune cavity-enhanced optical heterodyne molecular spectrometry: experimental demonstration and validation of predicted line shape," J. Opt. Soc. Am. B 29, 2980-2989 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-10-2980

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