中文摘要：

针对物理损伤的精确评估问题，分析了自相位调制（SPM）对群速度色散（GVD）的抑制或加强作用。基于它们共同对信号产生的影响，提出了考虑物理损伤联合影响的光信号脉宽模型，并将此模型应用到基于物理损伤感知的路由波长分配（IA－RWA）算法仿真中。仿真结果表明，综合考虑物理损伤的联合影响有利于准确规避损伤严重的路径，降低阻塞率。

英文摘要：

For the accurate assessment of physical impairments, the suppression or enhancement effect of self phase modulation （SPM） on group velocity dispersion （GVD） were analyzed. Then, a pulse width model based on their combined effects on signal distortion was proposed. This model considered the effects of combined physical impairments, and it was applied in the simulation of the impairment-aware routing and wavelength assignment （IA-RWA） algorithm. The results indicate that comprehensive consideration of the effects caused by combined physical impairments is conductive to accurately avoid more serious physical impairments during routing and reduces blocking rate.