摘要
在纳秒时域 ,研究了激光脉冲宽度变化对克尔介质中瞬态热光非线性效应的影响 .通过不同脉冲宽度τp 下得到的二硫化碳苯胺黑溶液的Z_scan实验结果 ,对瞬态热光非线性效应和光克尔效应的共存过程进行了分析 .随着脉冲宽度的增加 ,观察到了热光非线性效应从瞬态到稳态变化过程和Z_scan峰谷特性的转变 .同时 ,从声波的传播方程和光波的非线性传播方程出发 ,用数值计算方法模拟了这一非线性过程 。
We report the experimental results on the effect of pulse width on transient thermally induced optical nonlinearities in the nanosecond regime. We have obtained the Z_scan curves of the CS_(2) solutions of nigrosine for different pulse widths, and analyzed the co_existence of third_order and transient thermally induced optical nonlinearities. The process of changing from transient state to steady_state thermal_induced optical nonlinearities was observed. Meanwhile, we have obtained the results of numerical simulation by solving simultaneously acoustic and electromagnetic wave equations, which agree well with the experimental results.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第10期3577-3582,共6页
Acta Physica Sinica
基金
国家自然科学基金 (批准号 :60 0 2 5 5 12 )
教育部科学技术研究重点项目 (批准号 :0 0 0 2 6)
教育部高校骨干教师计划及霍英东教育基金(批准号 :710 0 8)资助的课题~~
