Nonlinear Optical Phenomena beyond the Slowly Varing Envelope Approximation

对于周期时间区域的光波技术的研究，实验得到了以下结果：(1)利用基于空间光调制器（SLM）的新型啁啾补偿技术实现4.1-fs、1.78光周期脉冲压缩；(2)利用玻璃光纤输出的棱镜对和SLM的新型混合啁啾补偿产生100 mhz重复的7.1-fs变换限制脉冲；(3)研制了SH-FROG装置和SPIDER装置，分别测量5.0-fs脉冲和5.0-fs脉冲的时间强度和相位分布。(4)首次演示了使用二维SLM和空间滤波器的同步、相干三色飞秒脉冲成形。

As for the study on the optical-wave technology in the cycle-time region, the following results have been achieved experimentally : (1) 4.1-fs, 1.78-optical-cycle pulse compression using a novel chirp-compensation technique based on a spatial light modulator (SLM), (2) the generation of 100-MHz repetitive, 7.1-fs transform-limited pulses by a new hybrid chirp compensation of a prism pair and a SLM for the glass-fiber output, (3) developments of a SH-FROG apparatus and a SPIDER apparatus which enable us to measure temporal intensity and phase profiles of 5.0-fs pulses and those of 5.0-fs pulses, respectively, and (4) the first demonstration of simultaneous, coherent three-color femtosecond pulse-shapings using a two-dimensional SLM and a spatial filter.