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实现了应用于神光Ⅱ装置中的高精度整形激光脉冲与激光探针同步方案。在该方案中,激光探针经硅光导开关进行光电转换之后作为激光脉冲整形单元的触发信号,使激光脉冲整形单元,输出与激光探针同步的整形激光脉冲。为了降低由于触发信号不稳定引起的时间晃动,在光电转换之前放大激光探针,以调整激光脉冲整形单元触发信号的幅度。在神光Ⅱ装置中实现了整形激光脉冲与激光探针小于4.5 ps(均方根)的时间同步精度。
The high-precision shaping laser pulse and laser probe synchronization scheme used in SG-II device are realized. In this scheme, the laser probe is used as the trigger signal of the laser pulse shaping unit after being photoelectrically converted by the silicon photoconductive switch so that the laser pulse shaping unit outputs the shaping laser pulse synchronized with the laser probe. In order to reduce the time fluctuation caused by the instability of the trigger signal, the laser probe is enlarged before the photoelectric conversion to adjust the amplitude of the trigger signal of the laser pulse shaping unit. The time synchronization accuracy of the shaping laser pulse and the laser probe is less than 4.5 ps (root mean square) in the SG-II device.