论文部分内容阅读
自行搭建的自锁模钛宝石激光器工作在下稳区的上边界附近,采用熔融石英棱镜对在激光器谐振腔的腔内和腔外同时进行群速度色散补偿.随着腔内棱镜对提供色散补偿的变化,输出激光脉冲的频谱会突然展宽至664—840nm,其空间模式也由基横模变化至衍射环状结构,这是受激拉曼散射和四波混频效应导致锁模激光脉冲频谱进一步展宽的结果.在此状态下自锁模钛宝石激光器可实现670—865nm范围的波长调谐.如此宽的频谱为钛宝石激光器产生亚10fs激光脉冲提供了必要的条件.
The self-locking self-locking Ti: sapphire laser works near the upper boundary of the lower steady region, and uses the fused silica prism to perform the group velocity dispersion compensation in the cavity and the cavity of the laser resonator. With the cavity prism providing dispersion compensation Change, the output laser pulse spectrum will suddenly broaden to 664-840nm, the spatial mode also changes from the fundamental transverse mode to the diffraction ring structure, which is stimulated Raman scattering and four-wave mixing effect leads to the mode-locked laser pulse spectrum further In this state, the self-mode-locked Ti: sapphire laser can achieve wavelength tuning in the range of 670-865 nm, and such a wide spectrum provides the necessary conditions for the sub-10 fs laser pulse of the Ti: sapphire laser.