Moving grating during erasure in photorefractive Bi 12 SiO 20 crystals
- 11 September 1986
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 22 (19) , 1030-1032
- https://doi.org/10.1049/el:19860704
Abstract
During the erasure of a photorefractive grating in Bi12SiO20, the space-charge field moves at a constant velocity and its amplitude exponentially decays. The experiment confirms that the diffracted beam is frequency-shifted and the amount of frequency shift is equal to that required for optimum beam coupling in nearly degenerate two-wave mixing.Keywords
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