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Threshold effect of incident light intensity on the photorefractive light-induced scattering in double-doped lithium niobate crystals and its application |
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| Authors: | ZHANG Guoquan XU Jingjun ZHANG Xinzhen SUN Qian LI Guangao LIU Simin ZHANG Guangyin |
| Affiliation: | Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China,Photonics Research Center, College of Physics Science, Nankai University, Tianjin 300071, China |
| Abstract: | The formation mechanism of fanning noise in lithium niobate crystal is theoretically studied using the multi-wave mixing model. The threshold effect of incident light intensity for the photorefractive light-induced scattering in double doped lithium niobate crystal is explained by combining the multi-wave mixing model with the rwo-photorefrac-tive-sensitive-center model for single charge-carrier. Light amplification competition between the fanning noise and the signal beam in doped lithium niobate crystals is also studied. The existence of optimum photovoltaic field and optimum pump intensity is predicted theoretically. |
| Keywords: | lithium niobate scattering threshold intensity amplification noise. |
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