Ultra-short pulse self-correlation measuring device and method

The invention relates to an ultra-short pulse self-correlation measuring device and method. The device comprises a first collimating lens and a half-wave plate, a polarization beam splitter prism, a first reflector, a controllable delay reflector, a chopper and a second reflector, a second collimating lens, a carbon nanotube saturated absorber film, a photomultiplier, a phase-locked amplifier anda computer. Through a simple structure, the ultra-short pulse width measurement with low power and low energy can be realized. 种超短脉冲自相关测量装置和测量方法，该装置包括第准直透镜、二分之波片、偏振分光棱镜、第反射镜、可控延时反射镜、斩光器、第二反射镜、第二准直透镜、碳纳米管饱和吸收体薄膜、光电倍增管、锁相放大器和计算机。本发明通过简单的结构，就可以实现对低功率、低能量的超短脉冲宽度的测量。