Optical nonlinearities of tea studied by Z-scan and four-wave mixing techniques
- 1 April 1994
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 11 (4) , 636-643
- https://doi.org/10.1364/josab.11.000636
Abstract
Optical nonlinearities of black-tea extract dissolved in water are studied using the Z-scan and the four-wave mixing techniques with 7-ns, 532-nm pulses from a Q-switched Nd:YAG laser. The magnitude of the third-order nonlinear optical susceptibility of tea in water is comparable with that of carbon disulfide. The nonlinearity is identified to be of thermal origin.Keywords
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