Elsevier

Optics Communications

Volume 124, Issues 1–2, 15 February 1996, Pages 103-110
Optics Communications

Effects of nonlinear Fabry-Pérot resonator response on Z-scan measurements

https://doi.org/10.1016/0030-4018(95)00608-7Get rights and content

Abstract

We report experimental results of Z-scan investigations on the photoinduced nonlinear absorption and refractive index of submillimeter bulk samples of the III–V semiconductor InSb. The measurements were carried out in the cw regime at λ = 10.6 μm using a CO2 laser. The results put into evidence the contribution of the nonlinear Fabry-Pérot resonator, constituted by the high-refractive-index sample itself, to the transmittance of the system. Such contribution can lead to a wrong evaluation of the nonlinear optical coefficents in Z-scan experiments. The experimental data were fitted using a modified Z-scan theory in which the effect of the resonator is taken into account. The values for the nonlinear absorption and refractive index used in the fit are in good agreement with those reported in literature.

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  • Cited by (0)

    1

    On leave from Polytechnical Institute, Kishinev, Moldova (CSI).

    2

    The authors are also with Istituto Nazionale di Fisica della Materia and Gruppo Nazionale di Elettronica Quantistica e Plasmi of CNR.

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