| Original Articles |
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Saturable Nonlinearity in Photovoltaic-Photorefractive Crystals Under Open-circuit Condition |
| GUO Ru;LING Zhen-Fang;CHEN Xiao-Hu;ZHANG Guo-Quan;ZHANG Xin-Zheng;WEN Hai-Dong;JIANG Ying;LIU Si-Min |
| College of Physics Science, Nankai University, Tianjin 300071 |
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| Cite this article: |
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GUO Ru, LING Zhen-Fang, CHEN Xiao-Hu et al 2000 Chin. Phys. Lett. 17 804-805 |
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Abstract We show that the refractive index change induced by a focused incident beam with an additional incoherent uniform illumination in photovoltaic-photorefractive crystals under open-circuit condition has a saturable nonlinearity form. The incoherent uniform background illumination can be used to increase the effective dark irradiance. The formation time of the photovoltaic soliton can be decreased by keeping the intensity of the soliton at a higher value without over-saturation by use of the background illumination.
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| Keywords:
42.65.Hw
42.65.Jx
72.40.+w
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Published: 01 November 2000
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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72.40.+w
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(Photoconduction and photovoltaic effects)
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