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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 25 — Sep. 1, 2008
  • pp: 4627–4632

Quantitative measurements of CO 2 and CH 4 using a multipass Raman capillary cell

William F. Pearman, J. Chance Carter, S. Michael Angel, and James W-J. Chan  »View Author Affiliations


Applied Optics, Vol. 47, Issue 25, pp. 4627-4632 (2008)
http://dx.doi.org/10.1364/AO.47.004627


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Abstract

Raman measurements of two common gases are made using a simple multipass capillary Raman cell (MCC) coupled to an unfiltered 18 around 1 fiber-optic Raman probe. The MCC, which is fabricated by chemical deposition of silver on the inner walls of a 2 mm inner diameter glass capillary tube, gives up to 20-fold signal enhancements for nonabsorbing gases. The device is relatively small and suitable for remote and in situ Raman measurements with optical fibers. The optical behavior of the MCC is similar to previously described liquid-core waveguides and hollow metal-coated waveguides used for laser transmission, but unlike the former devices, the MCC is generally applicable to a very wide range of nonabsorbing gases.

© 2008 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(290.5860) Scattering : Scattering, Raman
(300.6450) Spectroscopy : Spectroscopy, Raman

ToC Category:
Spectroscopy

History
Original Manuscript: April 25, 2008
Manuscript Accepted: July 16, 2008
Published: August 29, 2008

Citation
William F. Pearman, J. Chance Carter, S. Michael Angel, and James W-J. Chan, "Quantitative measurements of CO2 and CH4using a multipass Raman capillary cell," Appl. Opt. 47, 4627-4632 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-25-4627


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References

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