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7 February 2005 The growth and photorefractive effect of codoped Ce:Cu:BGO crystals
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The photorefractive BGO crystal shows rapid respond (second level) when applied by external electric field, but it has weak photorefractive effect. CeO2 and CuO co-doped BGO (Bi12GeO20) crystal has been grown by Czochralski method for the first time. The diffraction efficiency and respond time of Ce:Cu:BGO and BGO crystals are determined with two-wave-coupling technology. The phase conjugate reflectivity and respond time are also determined in four-wave-fixing optical path. The results indicate that diffraction efficiency and phase conjugate reflectivity of Ce:Cu:BGO is 30% higher than those of non-doped BGO and the response time exhibits in second level with 6kv/cm2 external electric field. The improvement mechanism of photorefractive effect of Ce:Cu:BGO crystal is investigated systematically.
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Wei Zheng, Fengchun Wang, and Yuheng Xu "The growth and photorefractive effect of codoped Ce:Cu:BGO crystals", Proc. SPIE 5636, Holography, Diffractive Optics, and Applications II, (7 February 2005);

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