演讲摘要：

课题组首先以非线性薛定谔方程（NLSE）为基础，采用慢变包络近似（SVEA），建立了2D+1维传输问题的全效应物理模型，开发了可用于宽谱飞秒脉冲传输光场时空分布构建的并行化数值仿真工具UPDyC1.0 (Ultrashort Pulse Dynamic Code 1.0)，利用该数值工具，可对色散介质中的多种非线性传输物理效应进行理论描述。其次，发展了基于openMP的并行化计算方案，结果表明并行加速比和并行效率有较大提高，大大改进了飞秒激光脉冲传输模拟的研究效率。第三，利用UPDyC1.0软件模拟研究了飞秒激光脉冲传输过程中高阶克尔效应（HOKE）和等离子体散焦对成丝效应的影响。 In order to help to explain the mechanism of femtosecond laser pulse interaction with air, we developed a tool ,Ultrashort Pulse Dynamic Code 1.0(UPDyC1.0), applied to simulate the pulse propagation dynamics characteristic, which taking into account a full model based on 2D+1 nonlinear Schrödinger equation (NLSE). We describe further approaches for parallel solution of time-dependent NLSE basing on openMP in UPDyC1.0. Then a sequence of numerical tests was carried out for investigation on many competing effects contribution on filamentation with respect to different pulse duration. The results will show HOKE play an important role in filamentation regime, which obviously affects the dynamic equilibrium.