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Applied Optics

Applied Optics


  • Vol. 40, Iss. 9 — Mar. 20, 2001
  • pp: 1563–1569

Optical saturation in continuous-wave photothermal deflection spectroscopy: quantitative investigation of fundamental and harmonic components

Bincheng Li and Rajendra Gupta  »View Author Affiliations

Applied Optics, Vol. 40, Issue 9, pp. 1563-1569 (2001)

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A rigorous theoretical model has been developed that describes the effects of optical saturation on the deflection signals in cw photothermal experiments. In this model the spatial profile of the excitation beam has been taken into account. Numerical calculations have been performed to determine the saturation behavior of the cw photothermal deflection signals at both the fundamental and the second-harmonic frequencies for sine-wave modulation of the excitation beam. Saturation behavior for square-wave modulation has also been investigated.

© 2001 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6430) Spectroscopy : Spectroscopy, photothermal
(300.6460) Spectroscopy : Spectroscopy, saturation
(350.5340) Other areas of optics : Photothermal effects

Original Manuscript: June 26, 2000
Published: March 20, 2001

Bincheng Li and Rajendra Gupta, "Optical saturation in continuous-wave photothermal deflection spectroscopy: quantitative investigation of fundamental and harmonic components," Appl. Opt. 40, 1563-1569 (2001)

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