High Sensitive Measurement of Absorption Coefficient and Optical Nonlinearities with a Single Experimental Setup

Details High Sensitive Measurement of Absorption Coefficient and Optical Nonlinearities with a Single Experimental Setup High Sensitive Measurement of Absorption Coefficient and Optical Nonlinearities with a Single Experimental Setup

2002-01-08

arxiv.org/abs/physics/0201009v1

Physics

Optics

8 pages, 4 figures, submitted to APL

Scientific paper

Accurate knowledge of absorption coefficient of a sample is a prerequisite for measuring the third order optical nonlinearity of materials, which could become a serious limitation for unknown samples. We introduce a new method, which measures both the absorption coefficient and the third order optical nonlinearity of materials with high sensitivity in a single experimental setup. We use a dual-beam pump-probe experiment under different conditions to achieve this goal. We also demonstrate a counterintuitive coupling of the non-interacting probe-beam with the pump-beam in pump-probe z-scan experiment.

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