对飞秒激光等离子体中成丝现象的研究

STUDY ON FILAMENTATION IN FEMTOSECOND LASER PLASMAS

采用光学阴影法和散射光成像 ,对飞秒激光等离子体中的局域密度涨落进行了研究 .在实验中观察到了成丝不稳定性现象 .从理论上对有质动力引起的局域密度涨落进行了分析 .分析表明 ,这种成丝不稳定性主要是由有质动力造成的 .

The local density fluctuation in femtosecond laser plasmas has been studied using optical shadowgraphy and scattering imaging techniques.The instability of filamentation in the laser plasma has been observed,and the local density fluctuation studied.The result shows that this instability of filamentation is caused by the ponderomotive force.