NDLI: Grating response time of photorefractive KNbO/sub 3/:Rb/sup +/

Content Provider	IEEE Xplore Digital Library
Author	Yuheng Zhang Campbell, S. Pochi Yeh Dezhong Shen Xiaoyan Ma Jiongyao Chen
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA (Yuheng Zhang; Campbell, S.; Pochi Yeh)
Abstract	Photorefractive crystals play an increasingly important role in optical information processing. Some of these crystals have been used in a variety of optical computing applications. The photorefractive response time is a critical issue because it directly determines the processing speed of the devices. Crystals that are widely used at present, such as BaTiO/sub 3/, LiNbO/sub 3/, and SBN, etc., are relatively slow when the light intensity is 1 W/cm/sup 2/. Semiconductor crystals such as GaAs and GaP have a higher speed but suffer from small coupling constants. For high processing speed, KNbO/sub 3/ has the best promise because it has the highest figure of merit among the oxide photorefractive crystals. Volt et. al studied the photorefractive response time of KNbO/sub 3/:Fe. They found that reduction of the crystal could decrease the response time by several orders of magnitude. However, such KNbO/sub 3/ crystals often become optically inhomogeneous after reduction. In this paper, we report our investigation of the transient photorefractive response of KNbO/sub 3/:Rb/sup +/ crystals, which exhibit a fast response time while maintaining a significant gain and good optical homogeneity for information processing applications.
Starting Page	284
Ending Page	286
File Size	250848
Page Count	3
File Format	PDF
ISBN	0780314735
DOI	10.1109/NLO.1994.470818
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-07-25
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delay Photorefractive effect Crystals Polarization Optical modulation Diffraction gratings Photorefractive materials Laser beams Information processing Lenses
Content Type	Text
Resource Type	Article

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