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Proceedings Paper

Two-wave mixing in a Ce:KNSBN crystal with incoherent erasing technique
Author(s): Baolai Liang; Qinglin Guo; Guangsheng Fu; Zhaoqi Wang
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Paper Abstract

Two-wave mixing properties of a Ce:KNSBN photorefractive crystal is experimentally studied while the ihcoherent erasing technique is applied. As the signal beam is with extraordinary polarization and the polarized direcitn of the pump beam has an angle φ with its extraordinarily polarized direction, the gain of the signal beam is measured with respect to the angle φ. Because of the erasing of the fanning by the ordinary component of the pump beam, the gain enhances at small angle φ and obtains its maximum at φ = 30°. The couple-wave theory with considering of the fanning effect is used to fit the experimental data and the fitting curve is coincident wiht the experimental data very well. The calculated results of the gain as a fucntin of the angle φ for different fanning factor are given out. Finally the enhancement of the gain is experimentally measured with respect to the angle between the signal beam and the normal of the crystal face. While this angle takes θ=11°, the enhancement of the gain obtains its minimum value, which means the minimum fanning.

Paper Details

Date Published: 17 September 2002
PDF: 6 pages
Proc. SPIE 4918, Materials, Devices, and Systems for Display and Lighting, (17 September 2002); doi: 10.1117/12.483091
Show Author Affiliations
Baolai Liang, Hebei Univ. (China)
Qinglin Guo, Hebei Univ. (China)
Guangsheng Fu, Hebei Univ. (China)
Zhaoqi Wang, Nankai Univ. (China)

Published in SPIE Proceedings Vol. 4918:
Materials, Devices, and Systems for Display and Lighting
Fuxi Gan; Ming Hsien Wu; Lionel C. Kimerling, Editor(s)

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