中文摘要：

设计搭建了一套基于液晶空间光调制器的飞秒激光脉冲整形系统装置,利用自己开发的LabVIEW程序控制液晶空间光调制器对飞秒激光脉冲施加正弦相位扫描,并同时记录其倍频光谱。其中对正弦相位扫描初始相位δ从0到4π的扫描所得到的倍频轨迹图为多光子脉冲内干涉相位扫描（MIIPS）轨迹,并详细研究了正弦相位中的幅度α、频率γ两个参量的选择对于MIIPS倍频轨迹图的影响,得出了MIIPS方法中α和γ参量的优化选择条件。所得到的结果不仅对更好地利用MIIPS方法进行飞秒激光脉冲相位测量和补偿提供指导,而且可以通过选取合适的参量获得整形和窄化的倍频光谱,这在双光子光谱学、飞秒化学和飞秒生物学等领域具有重要应用。

英文摘要：

A femtosecond pulse shaper is set up based on a liquid crystal spatial light modulator.The pulse shaper is driven by home-developed LabVIEW programs.The second harmonic generation（SHG）spectrum is recorded when the femtosecond laser pulse is modulated by a sinusoidal phase function.The multi-photon intra-pulse interference phase scan（MIIPS）trace is obtained with the parameterδ,witch is the initial phase of sinusoidal phase scanning,scanning from0 to 4π.The effects of the sinusoidal phase′s amplitude and frequency（αandγ）are studied in detail for the optimization of MIIPS.The results not only provide a guidance for the phase measurement and compensation in MIIPS,but also supply a method for narrowing and shaping SHG spectrum,which will be useful in many fields,such as two-photon absorption spectroscopy,femtosecond chemistry and femtosecond biology.