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Growth and Storage Properties of In∶Ce∶Cu∶LiNbO_3 Crystal

WANG Jun,XU Wu sheng,WANG Rui (Institute of Photo electron Technology,Harbin Institute of Technology,Harbin 150001,China) (Received 20 May 2002)  
Doping In 2O 3 in Ce∶Cu∶LiNbO 3,In∶Ce∶Cu∶LiNbO 3 crystals were grown by CZ method.The photorefractive resistance ability of the crystals was measured,which shows the ability of In(3mol%)∶Ce∶Cu∶LiNbO 3 is two orders of magnitude higher than that of Ce∶Cu∶LiNbO 3. The infrared spectra of the crystals indicate that the OH - absorption peak of In(3mol%)∶Ce∶Cu∶LiNbO 3 shifts to 3508cm -1 from that of LiNbO 3 of 3484cm -1 .The exponential gain coefficient,diffraction efficiency and response time of these crystals were also obtained.The response rate of In(3mol%)∶Ce∶Cu∶LiNbO 3 is three times faster than that of Ce∶Cu∶LiNbO 3.The mechanisms of the photorefractive resistance ability enhancement and the violet shifting of the OH - absorption peak in the infrared spectra of In∶Ce∶Cu∶LiNbO 3 were investigated.
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