基于多层膜系传输矩阵理论的双啁啾镜设计与实验

把光在多层膜中传输的矩阵理论应用于双啁啾镜的设计。理论分析结果表明设计的双啁啾镜可以对波长从600 nm到1 100 nm波段范围的色散进行补偿,每次可以实现-100 fs2的色散补偿量,而且双啁啾镜可以有效降低单镜色散补偿中的寄生振荡。用设计制造的双啁啾镜进行了实验测试,用双啁啾镜对畸变脉冲进行色散补偿,实验结果表明:经过两次色散补偿可以将脉冲还原至初始状态,而过量的负色散又将脉冲重新展宽。     

迈克尔逊干涉在超短脉冲测量中的应用

分析了迈克尔逊干涉仪用于强度自相关测量超短脉冲的原理,设计了非共线结构迈克尔逊干涉仪,并利用二次谐波晶体对超短脉冲的强度自相关过程进行分辨,实现对超短脉冲的测量。     

法布里-珀罗干涉在超短激光脉冲测量中的应用

把大学物理光学中法布里-珀罗干涉的方法应用于超短激光脉冲测量.分析了利用法布里-珀罗标准具中多光束干涉产生自相关信号进行超短激光脉冲测量的原理;进行了实验测试并与迈克耳孙干涉自相关的测量结果进行了对比,实现了对超短激光脉冲时间宽度的测量.     

Pulse collapse and blue-shifted enhanced supercontinuum in a photonic crystal fiber

The blue-shifted supercontinuum generation in a photonic crystal fiber pumped by high peak power femtosecond pulses with a wavelength located in the anomalous dispersion region is investigated experimentally and numerically.The formation of a blue-shifted enhanced supercontinuum due to the pulse collapse is demonstrated.The process of the pulse collapse is measured by using the grating-eliminated no-nonsense observation of ultrafast incident laser light e-fields technique(GRENOUILLE).Numerical simulations in spectral and temporal domains are conducted.The data from the numerical simulations are in good agreement with the experimental results.Our experimental results and numerical simulations show that pulse collapse is the determining factor in the generation of a blue-shifted supercontinuum.