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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26079–26087

Optical cavity for auto-referenced gas detection

Juan Carlos Martinez Antón and Manuel Silva-López  »View Author Affiliations


Optics Express, Vol. 19, Issue 27, pp. 26079-26087 (2011)
http://dx.doi.org/10.1364/OE.19.026079


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Abstract

An enhanced optical system design for NDIR gas detection is presented. Multiple paths lengths within the same cavity are used to auto reference the system. The system has good thermo-mechanical stability: it requires no special thermal stabilization, shows no sensitivity to thermal emitter drift and has no moving parts involved. Long term stability, virtually no zero-drift and sub-ppm level gas detection were achieved using commercial thermopile sensors and a thermal emitter modulated at low frequency (~0.5 Hz). Experimental tests were performed using carbon monoxide (CO) and a 30.5 cm cavity length. The design can be extended to allow multiple gas detection within the same optical cavity.

© 2011 OSA

OCIS Codes
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: October 6, 2011
Revised Manuscript: November 11, 2011
Manuscript Accepted: November 13, 2011
Published: December 7, 2011

Citation
Juan Carlos Martinez Antón and Manuel Silva-López, "Optical cavity for auto-referenced gas detection," Opt. Express 19, 26079-26087 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-27-26079


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References

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