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基于非线性传输方程与五能级速率方程的耦合模型分析了超高斯脉冲在反饱和吸收(RSA)作用下的动态响应特性。研究了脉冲时空波形在RSA材料中的演化规律以及脉冲与材料相互作用的动力学过程。讨论了单重态第一激发态寿命对输出脉冲时空波形的影响,并优化了材料参数以避免时空畸变。对新型RSA材料的开发以及在时空波形敏感领域的应用具有指导意义。
The dynamic response characteristics of super-Gaussian pulse under the effect of reverse saturable absorption (RSA) are analyzed based on the coupling model between nonlinear transmission equation and five-level rate equation. The evolution of pulse space-time waveform in RSA material and the dynamics of pulse-material interaction were studied. The influence of the lifetime of singlet state on the spatiotemporal waveform of output pulse is discussed, and the material parameters are optimized to avoid spatiotemporal distortion. The development of new RSA materials and the application in the field of space-time waveform sensitivity are instructive.