Potassium lithium tantalate niobate photorefractive crystals

Compositions – Light transmission modifying compositions – Inorganic crystalline solid

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359301, G02B 520, G02B 2608

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active

057858985

ABSTRACT:
Photorefractive crystals having the formula K.sub.1-y Li.sub.y Ta.sub.1-x Nb.sub.x O.sub.3 wherein x is between 0 and 1 and y is between 0.0001 and 0.15. The crystals are useful as a photorefractive material for use in optical systems. The crystals may be doped with various first transition elements and lanthanides including copper, vanadium, chromium, iron, and manganese, nickel, europium and cerium.

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Agranat, A.; Hofmeister, R. and Yariv, A.: "Characterization of a new photorefractive material: K.sub.1-y L.sub.y T.sub.1-x N.sub.x," Optical Soc. of Amer. vol. 17, No. 10, May 15, 1992, pp. 713-715.
Fukuda, T.: "Structural and Dielectric Studies of Ferroelectric K.sub.3 Li.sub.2 (Ta.sub.x Nb.sub.1-x).sub.5 O.sub.15," Japanese Journal of Applied Physics, vol. 9, No. 6; Jun. 1970, pp. 599-606.
Bonner, W.A.; Grodkiewicz, W.H. and Van Uitert, L.G.: "The Growth of K.sub.0.6 Li.sub.0.4 NbO.sub.3 Crystals for Electro-Optic and Non-Linear Applications," Journal of Crystal Growth 1 (1967), pp. 318-319.
Agranat, A.; Leyva, V.; Sayano, K.; Yariv, A.: "Photorefractive properties of KTa.sub.1-x Nb.sub.x O.sub.3 in the paraelectric phase," Proc. of SPIE, vol. 1148 (1989), pp. 1-15.
Van Uitert, L.G.; Singh, S.; Levinstein, H.L.; Geusic, J.E.; Bonner, W.A.: "A New and Stable Nonlinear Optical Material," Applied Physics Letters, vol. 11, No. 5, Sep. 1, 1967, pp. 161-163.

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