【摘要】 描述了利用激光感应瞬态光栅技术测量超短脉冲激光的脉冲宽度和相干时间的方法．来自同一光源的两束激光在非线性介质中相干形成积分光栅，测量光栅自衍射强度与两束光脉冲之间的延迟时间关系，利用相干光束的四阶相干函数关系，可以求出光源的脉冲宽度和相干时间．更多还原

【Abstract】 In this paper, we describe the method of measuring the duration and the coherence time of ultrashort laser pulses using the technique of transient grating induced by laser. The two beams from the same laser interfer in the nonlinear medium and induce an integrated-intensity grating. Measureing the self-diffraction signal intensity versus the delay time between the two laser pulses and using the forth-order coherence function, we can get the duration of the laser pulse and coherence time.更多还原