【摘要】 置于真空靶室中的金属靶 ( Fe) ,在高功率激光作用下产生的高密度等离子体 ,对入射激光有较强的受激布里渊散射效应。这种逆着入射激光方向的散射光 ,在5× 1 0 1 1 W/cm2 的激光功率密度作用下 ,后向散射能量是 0 .1 6 J。这种后向散射光 (反射 ) ,在激光器系统不加光学隔离的情况下 ,又反馈回来 ,使激光器某单元形成激光振荡 ,在激光器高功率单脉冲输出之后 ,又产生很强的自由振荡激光输出 ,使激光力学效应物理实验出现导常现象更多还原

【Abstract】 The high density plasma will be generated by metal target(Fe) placed in vacuum chamber when it is irradiated by high power laser.The plasma will have a stronger stimulated Brillouin scattering (SBS) effect for the incident laser.The energy of the backscattered light of adverse incident laser is 0.16J under 5×10 11 W/cm 2 laser power density.The backscattered light will make certain unit of the laser oscillate and produce strong free oscillation laser output when the laser system has no optical separation.In this way the abnormal phenomenon will appear in the physical experiment of laser mechanical effect.更多还原