皮秒自相关仪的性能测试研究

Research on Precise Diagnostics for Pico-Sesond Single Shot Pulse

为了实现皮秒拍瓦激光的精密测试,研制了专用的皮秒自相关仪。选用无色散元件,提高了测量结果的可靠性。采用自标定方法标定时间分辨率,用超限法标定时间测量范围,用极值法标定脉冲响应特性。实验结果表明,皮秒自相关仪的时间分辨率为0.1ps/pixel,时间测量范围为26ps,脉冲响应特性的值为300fs。该皮秒自相关仪能够满足皮秒啁啾脉冲的时间宽度精密测试要求。

In order to realize precise diagnostics for pico-second pulse of peta-watt laser,an auto-correlator especially for single shot pico-second pulse is developed.Optical elements with no dispersion are used in this pico-second auto-correlator′s design,which could improve its precise.Three methods are adopted to testify its characters.Self-calibration is used for time resolution.Over-range is used for time range.Limitation is used for impulse response function.Experimental results show that its time resolution is 0.1 ps/pixel,its time range is 26 ps,and its impulse response function value is 300 fs.So this auto-correlator can fulfill the requirement of precised measurement on pulse width for chirped pulse of pico-second peta-watt laser.