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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 8 — Mar. 10, 2008
  • pp: 1054–1062

Effect of beam sizes on the amplitude and phase of photothermal deflection signals for both uniform and nonuniform heating

Imen Gaied, Aymen Amara, Noureddine Yacoubi, and Taher Ghrib  »View Author Affiliations

Applied Optics, Vol. 47, Issue 8, pp. 1054-1062 (2008)

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A detailed theoretical treatment of a one- (1D) and three-dimensional (3D) photothermal deflection (PTD) technique is presented. Important effects of the probe beam size occur in PTD experiments when the radius of this beam is of the order of magnitude of the thermal diffusion length. The calculation of this effect is checked by experiments in paraffin oil at low modulation frequency as well as for 1D and for 3D. In this last case, we have considered two kinds of deflection: normal and transverse, and we have studied their variation for different values of the pump beam radius. The coincidence between theoretical and experimental curves confirms the validity of our theoretical model.

© 2008 Optical Society of America

OCIS Codes
(140.6810) Lasers and laser optics : Thermal effects
(190.4870) Nonlinear optics : Photothermal effects

ToC Category:
Nonlinear Optics

Original Manuscript: September 11, 2007
Revised Manuscript: December 11, 2007
Manuscript Accepted: January 11, 2008
Published: March 6, 2008

Imen Gaied, Aymen Amara, Noureddine Yacoubi, and Taher Ghrib, "Effect of beam sizes on the amplitude and phase of photothermal deflection signals for both uniform and nonuniform heating," Appl. Opt. 47, 1054-1062 (2008)

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