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Proceedings Paper

Degenerate four-wave mixing of nonether polyphenylquinoxaline solution
Author(s): Huimin Liu; Yanyun Wang; Weiyi Jia; Meng Shen; Shoukuan Fu
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Paper Abstract

Using picosecond laser operated at 532 nm, the observed time-resolved degenerate-four-wave-mixing (DFWM) spectra of nonether polyphenylquinoxaline (PPQ) solution show significant change in optical nonlinearity with changing solvents. For PPQ in cresol the DFWM spectrum obtained is composed of an instantaneous coherent optical response signal associated with the third-order susceptibility and a rapidly damped, laser-induced acoustic phonon signal. The lifetime of the generated acoustic phonon was estimated to be 1.5 ns. For PPQ in chloroform, an anomalously enhanced phonon signal overwhelms the intense coherent component. The generated acoustic phonon in PPQ-chloroform is much longer- lived. The mechanism of the observed optical response is discussed and the (chi) 3 value is calculated through resolving the coherent peak from the intense phonon signal.

Paper Details

Date Published: 7 October 1996
PDF: 6 pages
Proc. SPIE 2853, Nonlinear Optical Liquids, (7 October 1996); doi: 10.1117/12.253480
Show Author Affiliations
Huimin Liu, Univ. of Puerto Rico (United States)
Yanyun Wang, Univ. of Puerto Rico (United States)
Weiyi Jia, Univ. of Puerto Rico (United States)
Meng Shen, Fudan Univ. (China)
Shoukuan Fu, Fudan Univ. (China)


Published in SPIE Proceedings Vol. 2853:
Nonlinear Optical Liquids
Christopher M. Lawson, Editor(s)

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