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建立了一台谐波频率分辨光学开关法 (FROG)飞秒脉冲测量装置 ,利用该装置进行了掺钛蓝宝石飞秒激光脉冲的测量研究 .在二次谐波自相关测得的时域和频域信号基础上 ,结合对信号光强度分布的计算机迭代处理 ,得到了有关飞秒激光电场、光谱及其相位的信息 ,所得脉宽与干涉测量的结果基本一致 .
A FROG femtosecond pulse measuring device was set up and used to measure the pulse of Ti-doped sapphire femtosecond laser.In the second harmonic auto-correlation time domain and frequency Based on the domain signal, the information about the electric field, spectrum and phase of the femtosecond laser was obtained by computer iterative processing on the intensity distribution of the signal light. The obtained pulse width was basically consistent with the result of the interferometry.