空间光孤子脉冲在平面光波导中的传输

分析研究了空间光孤子脉冲化后在反常群速色散的克尔非线性平面光波导中的传输特性和稳 定性.当空间光孤子脉冲的时间宽度等于某一临界值时，脉冲发生自陷，小于该值时，脉冲 发生扩散，大于该值时，脉冲发生塌陷.空间光孤子的阶数越高，这个临界值越小.当空间光 孤子脉冲的时间宽度等于某一特定值时，脉冲塌陷最快，与这个特定值相差越大，塌陷越慢 .空间光孤子的阶数越高，这个特定值越小.脉冲自陷后的峰值光强、时间和空间宽度与输入 时的值有明显的不同. 关键词： 脉冲自陷 脉冲塌陷 光孤子

Propagation of pulses obtained by modulating spatial optical solitons in planar optical waveguide

Evolution of pulses obtained by modulating spatial optical solitons in a Kerr no nlinearity planar waveguide with anomalous dispersion is investigated. The pulse s will collapse, self_trapping or divergence according as its initial temporal w idth is more than, equal to or less than the critical value. The higher the orde r of the spatial soliton pulses, the smaller the critical value. The pulse colla pses fastest when its initial temporal width is equal to a special value, and th e more the difference between its initial temporal width and the special value, the slower it collapses. The higher the order of the spatial soliton pulses, th e smaller the special value. The peak power density, temporal and spatial width of the self_trapped pulses differ distinctly from their initial values