Evolution of Anomalous Hollow Gaussian Beams in Strongly Nonlocal Nonlinear Media Under the Off-Waist Incident Conditions |
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Authors: | Zhenfeng Yang |
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Institution: | 1.Department of Information Management,Hebei University of Science and Technology,Shijiazhuang,China |
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Abstract: | We investigate the evolution of anomalous hollow Gaussian beams in strongly nonlocal nonlinear media under the off-waist incident condition. We obtain analytic expressions of the beam propagation, the on-axis intensity, and the beam width and curvature. We perform some numerical simulations to illustrate the propagation properties of anomalous hollow Gaussian beams. The results show that, under the off-waist incident condition, the beam evolution is always periodic, whatever the input power is, being different from that under the on-waist incident condition. We discuss the influences of the input power and the departure distance on the propagation properties and present the physical reasons. |
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