Proctor B, Wise F
Opt Lett. 1992 Sep 15;17(18):1295-7. doi: 10.1364/ol.17.001295.
A sequence of four quartz prisms can be used to obtain large negative group-velocity dispersion with reasonable prism spacings and a small residual cubic phase. For a given value of the second-order dispersion and assuming minimal prism insertion, the third-order dispersion is 20% less than that of prism pairs that have been used in Ti:Al(2)O(3) lasers. A mode-locked Ti:Al(2)O(3) laser that includes the prism sequence generates pulses with intensity autocorrelations as short as 33 fs. Spectral bandwidths as large as 80 nm can also be obtained. A measurement of the dispersion of the laser shows that the cubic phase is approximately that of the prism sequence and the laser rod.
由四个石英棱镜组成的序列可用于在合理的棱镜间距和较小的残余立方相位情况下获得较大的负群速度色散。对于给定的二阶色散值，并假设棱镜插入损耗最小，三阶色散比用于钛宝石激光器的棱镜对小20%。包含该棱镜序列的锁模钛宝石激光器产生强度自相关短至33飞秒的脉冲。还可获得高达80纳米的光谱带宽。对该激光器色散的测量表明，立方相位近似于棱镜序列和激光棒的立方相位。
