Increasing the resistance of crystals to "optical damage"

Details Increasing the resistance of crystals to "optical damage" Increasing the resistance of crystals to "optical damage"

C - Chemistry, Metallurgy

01

D

C01D 15/00 (2006.01) C30B 15/00 (2006.01) C30B 29/30 (2006.01) G02F 1/35 (2006.01) G02F 1/355 (2006.01)

Patent

CA 2508828

The invention relates to a method for desensitising a crystal exhibiting non- linear optical properties, in particular a lithium niobate or lithium tantalate crystal against damage of exposure to light action ( optical damages ). The similar type damages are caused by refraction index modifications induced by light. The dark conductivity of the crystal is increased by doping with extrinsic ions.

L'invention concerne un procédé de désensibilisation d'un cristal aux propriétés optiques non linéaires, notamment un cristal de niobate de lithium ou de tantalate de lithium, à l'encontre de risques de détériorations sous l'effet de la lumière (<= détériorations d'ordre optique >=). Les détériorations de ce type sont dues àdes modifications de l'indice de réfraction, induites par la lumière. L'aptitude à la conduction d'obscurité du cristal est augmentée par dopage avec des ions extrinsèques.

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