Net coupling coefficient of two-wave mixing and its measurement in a photorefractive crystal

Jinsong Liu; Jianqi Zhang; Xiaopeng Shao

doi:10.1117/12.318108

17 August 1998 Net coupling coefficient of two-wave mixing and its measurement in a photorefractive crystal

Jinsong Liu, Jianqi Zhang, Xiaopeng Shao

Proceedings Volume 3554, Photorefractive Materials: Phenomena and Related Applications II; (1998) https://doi.org/10.1117/12.318108
Event: Photonics China '98, 1998, Beijing, China

Abstract

The main purpose of this paper is to distinguish the coupling coefficient from the net coupling coefficient in the two-wave mixing process. The coupling coefficient is dependent on the total intensity, whereas the net one is not. The larger the thermal emission rate or the weaker the total intensity is, the larger the difference between the two coupling coefficients will be. We present a method for measuring the net coupling coefficient and the saturation intensity in photorefractive material based on the detection of the gain of two-wave mixing at two total intensity levels. We investigate the temperature and the grating period dependence of the net coupling coefficient and the saturation intensity for Ce:Mn:LiNbO₃ and Cr:GaAs crystal, respectively.

Citation Download Citation

Jinsong Liu, Jianqi Zhang, and Xiaopeng Shao "Net coupling coefficient of two-wave mixing and its measurement in a photorefractive crystal", Proc. SPIE 3554, Photorefractive Materials: Phenomena and Related Applications II, (17 August 1998); https://doi.org/10.1117/12.318108

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