STABILITY OF BRIGHT SCREENING-PHOTOVOLTAIC SPATIAL SOLITONS

• 来源期刊: 中国物理（英文版）
• 关键词: nonlinear optics spatial solitons photorefractive effects
• 年，卷（期）: 2000,（9）
• 所属期刊栏目: GENERAL
• 页码范围: 667-671
• 页数: 5页
• 语种: 英文

摘要

We present a theoretical analysis of the stability of screening-photovoltaic (SP) spatial solitons in biased photovoltaic-photorefractive materials in the case of neglecting the loss of the material and the effect of diffusion.When an incident optical beam is a SP soliton, this beam propagates along a linear path with its shape kept unchanged.When the maximum amplitude, width and functional form of an incident optical beam are slightly different from those of a SP soliton, the beam reshapes itself and tries to evolve into a solitary wave after a short distance. That is, these SP solitons are stable against small perturbations. However, optical beams that significantly differ from SP soliton solutions tend to experience larger cycles of compression and expansion, and their maximum amplitudes oscillate with propagation distances. The larger the perturbations, the stronger the oscillation.