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High sensitive measurements of absorption coefficient and optical nonlinearities

✍ Scribed by Debabrata Goswami

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
196 KB
Volume
261
Category
Article
ISSN
0030-4018

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✦ Synopsis

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

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