Measurement of Nonlinear Absorption Coefficients of Organic Materials by Mode-Mismatched Z-scan Thermal Lensing Technique

Authors: Guerra, M.1; Taouri, A.2; Marcano O., A.3; Cabrera, H.4; Sylla, M.2

Source: Applied Spectroscopy, Volume 61, Issue 10, Pages 218A-242A and 1025-1133 (October 2007) , pp. 1128-1133(6)

Publisher: Society for Applied Spectroscopy

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Abstract:

We evaluate a new pump-probe mode-mismatched thermal lens (TL) scheme for the measurement of nonlinear absorption in nitrobenzene, benzene, and chloroform. In this new scheme the pump beam is focused in the presence of a collimated probe beam. Values of the nonlinear absorption coefficients of the materials studied for the wavelength of 532 nm are reported, and we compare the proposed technique with the well-known open Z-scan method.

Keywords: THERMAL LENS; Z-SCAN; NONLINEAR ABSORPTION

Document Type: Research article

DOI: 10.1366/000370207782217716

Affiliations: 1: Laboratoire des Proprietés Optiques de Matériaux et Applications, UMR-CNRS 6236, 2, Bd Lavoisier 49045 Angers Cedex, France; Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas 1020A, Apartado 21827, Venezuela 2: Laboratoire des Proprietés Optiques de Matériaux et Applications, UMR-CNRS 6236, 2, Bd Lavoisier 49045 Angers Cedex, France 3: Applied Optics Center, Delaware State University, 1200 N Dupont Highway, Dover, Delaware 19901 4: Instituto Venezolano de Investigaciones Científicas (IVIC), Caracas 1020A, Apartado 21827, Venezuela

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