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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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