Gan Xuetao, Zhang Peng, Liu Sheng, Zheng Youming, Zhao Jianlin, Chen Zhigang
The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
Opt Express. 2009 Dec 7;17(25):23130-6. doi: 10.1364/OE.17.023130.
We study nonlinear propagation of optical vortices in presence of hybrid nonlinearity as established in a nonconventional biased photorefractive crystal. Our results indicate that under hybrid nonlinearity the breakup of a singly-charged vortex along with the loss of its angular momentum is suppressed considerably as compared with that under conventional self-focusing or self-defocusing nonlinearity. Disintegration of a doubly-charged vortex under hybrid nonlinearity is also presented. Our experimental results are in good agreement with the numerical simulations.
我们研究了在非常规偏置光折变晶体中建立的混合非线性情况下光学涡旋的非线性传播。我们的结果表明，与传统的自聚焦或自散焦非线性相比，在混合非线性下，单电荷涡旋的破裂及其角动量的损失受到了显著抑制。还给出了双电荷涡旋在混合非线性下的解体情况。我们的实验结果与数值模拟结果吻合良好。
