Nonlinear Optical Phenomena beyond the Slowly Varing Envelope Approximation

在周期域光波技术的研究中，取得了以下实验结果：(1)采用基于空间光调制器(SLM)的新型啁啾补偿技术对4.1fS，1.78光周的脉冲进行压缩；(2)利用新型的棱镜对和SLM的混合啁啾补偿产生100 MHz重复的7.1fS变换受限脉冲用于玻璃纤维输出。(3)SH-FROG装置和SPIDER装置的发展，使我们能够分别测量5.0fS脉冲和5.0fS脉冲的时间强度和相位分布；(4)首次利用二维SLM和空间滤波器演示了同时进行的相干三色飞秒脉冲整形。

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.