Spatiotemporal instability of ultrashort pulse beam propagating through cubic nonlinear dispersive media is studied by using an extended nonlinear Schrdinger equation(NLSE).

• 利用一个拓展的非线性薛定谔方程,研究了高强度超短脉冲光束在三阶非线性介质中传输时的时空调制不稳定现象。