TITLE

Photorefraction in LiNbO[sub 3] as a function of [Li]/[Nb] and MgO concentrations

AUTHOR(S)
Furukawa, Y.; Kitamura, K.; Takekawa, S.; Miyamoto, A.; Terao, M.; Suda, N.
PUB. DATE
October 2000
SOURCE
Applied Physics Letters;10/16/2000, Vol. 77 Issue 16
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Photorefractive damage, photoconductivities, and photogalvanic currents of LiNbO[sub 3] single crystals have been investigated as a function of [Li]/[Nb] and MgO concentrations. Near stoichiometric LiNbO[sub 3] single crystal, having large [Li]/[Nb] ratios of 0.993, shows lower photorefractive damage resistance than congruent LiNbO[sub 3]. However, crystals doped with a small amount of MgO (>0.78 mol %) exhibit no measurable photorefractive damage at 532 nm to intensities of as much as 2 MW/cm2. This remarkable decrease of photorefraction that was found can be attributed to the decrease of saturated space charge field results from a combination of the increased photoconductivity and the decreased photogalvanic current of the crystal. © 2000 American Institute of Physics.
ACCESSION #
4433243

 

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