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Optics Letters

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  • Vol. 30, Iss. 12 — Jun. 15, 2005
  • pp: 1467–1469

Holographic chemical vapor sensor

Hongke Ye, Oyvind Nilsen, Victor M. Bright, and Dana Z. Anderson  »View Author Affiliations


Optics Letters, Vol. 30, Issue 12, pp. 1467-1469 (2005)
http://dx.doi.org/10.1364/OL.30.001467


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Abstract

A holographic interferometer senses vapor-induced optical path length changes in polymer or other chemically sensitive films. The interferometer is inherently sensitive to changes in chemical vapor content, self-compensates for drifts, and accommodates a large array of sensor elements. A sniff-locked-loop synchronous detection method takes advantage of the interferometer's rapid response to achieve vapor concentration sensitivity in the parts-per-billion (ppb, parts in 10^9) range. We demonstrate, for example, 40 ppb sensitivity to ethyl alcohol using poly(N-vinyl pyrrolidone) with a measurement time of 5 s.

© 2005 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(160.5470) Materials : Polymers
(190.5330) Nonlinear optics : Photorefractive optics

Citation
Hongke Ye, Oyvind Nilsen, Victor M. Bright, and Dana Z. Anderson, "Holographic chemical vapor sensor," Opt. Lett. 30, 1467-1469 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-12-1467


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