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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 15 — May. 20, 2005
  • pp: 3110–3116

Detection of photothermal deflection signals with conjugate masks

Anup Sharma, Gabriel Ycas, Zeyad Alahmed, and Rajendra Gupta  »View Author Affiliations


Applied Optics, Vol. 44, Issue 15, pp. 3110-3116 (2005)
http://dx.doi.org/10.1364/AO.44.003110


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Abstract

A new detection technique for photothermal deflection spectroscopy and photoacoustic deflection spectroscopy is presented. The technique uses a pair of matched multiple slits placed in the path of the probe beam and oriented to block the probe light from the detector in the absence of a deflection signal. Significant improvement in the signal-to-noise ratio and in the frequency bandwidth compared with those available with current techniques is demonstrated.

© 2005 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(300.6430) Spectroscopy : Spectroscopy, photothermal

History
Original Manuscript: August 13, 2004
Revised Manuscript: December 21, 2004
Manuscript Accepted: January 12, 2005
Published: May 20, 2005

Citation
Anup Sharma, Gabriel Ycas, Zeyad Alahmed, and Rajendra Gupta, "Detection of photothermal deflection signals with conjugate masks," Appl. Opt. 44, 3110-3116 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-15-3110


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References

  1. J. A. Sell, ed., Photothermal Investigations of Solids and Fluids (Academic, New York, 1989).
  2. A. Mandelis, ed., Principles and Perspectives of Photothermal and Photoacoustic Phenomena, Vol. 1 of Progress in Photothermal and Photoacoustic Science and Technology (North-Holland, New York, 1991).
  3. See, for example, the Proceedings of the 12th International Conference on Photoacoustic and Photothermal Phenomena, Rev. Sci. Instrum.74, 285–914 (2003).
  4. See, for example R. Gupta, in Photothermal Investigations of Solids and Fluids, J. A. Sell, ed. (Academic, New York, 1989), Chap. 3.
  5. A. Rose, G. J. Salamo, R. Gupta, “Photoacoustic deflection spectroscopy: a new species-specific method for combustion diagnostics,” Appl. Opt. 23, 781–784 (1984). [CrossRef] [PubMed]
  6. W. Zapka, P. Pokrowsky, A. C. Tam, “Optoacoustic laser deflection (OLD) technique for temperature measurements,” Opt. Lett. 7, 477–479 (1982). [CrossRef] [PubMed]
  7. A. Rose, R. Vyas, R. Gupta, “Pulsed photothermal deflection spectroscopy in a flowing medium: a quantitative investigation,” Appl. Opt. 25, 4626–4643 (1986). [CrossRef] [PubMed]
  8. Y. Li, R. Gupta, “Simultaneous measurement of absolute OH concentration, temperature, and flow velocity in a flame by photothermal deflection spectroscopy,” Appl. Phys. B 75, 903–906 (2002). [CrossRef]
  9. Y. Li, R. Gupta, “Measurement of absolute minority species concentration and temperature in a flame by the photothermal deflection spectroscopy technique,” Appl. Opt. 42, 2226–2234 (2003). [CrossRef] [PubMed]
  10. See, for example E. Hecht, A. Zajac, Optics (Addison-Wesley, Reading, Mass., 1974).
  11. A. Rose, “The development of pulsed photoacoustic and photothermal deflection spectroscopy as diagnostic tools for combustion,” Ph.D. dissertation (University of Arkansas, Fayetteville, 1986).

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