飞秒激光在PPQ有机高聚物中的传输特性研究  

Propagation of Femtosecond Optical Pulse in Organic Polymers∶PPQ

作　　者：赵应桥[1] 朱鹤元[1] 刘建华[1] 孙迭篪 李富铭[1] 

机构地区：[1]三束材料改性国家重点联合实验室复旦大学物理系

出　　处：《光学学报》1997年第1期16-19,共4页Acta Optica Sinica

基　　金：国家自然科学基金

摘　　要：有机高聚物是一种具有较大非线性系数和较快非线性响应时间的非线性材料。本文通过对含有二阶、三阶色散效应和非线性响应时间改进的非线性薛定谔方程进行数值模拟求解，分析了飞秒光脉冲在有机高聚物聚苯基喹恶啉（ＰＰＱ）中的传输特性。结果表明，脉冲在长波方向的自频移随非线性响应时间的增大先增大后减小。Organic polymers are attractive nonlinear materials because of their both large nonlinear coefficient and ultrafast response time. By use of the modified nonlinear Schrodinger equation, we have investigated numerically the effect of delayed nonlinear response time, as well as second and third order dispersion, on the propagation of femtosecond optical pulse. It has been shown that the red shift due to delayed nonlinear response time in frequency domain increases with the increasing of delayed nonlinear response time primarily, and then decreases when the delayed nonlinear response time exceeds a certain value.

关 键 词：有机高聚物 非线性响应时间 飞秒脉冲自频移 

分 类 号：O631.24[理学—高分子化学]