中文说明：
报道了在掺钛蓝宝石环形激光器中加入非线性折射率，n2较大的SF-57玻璃形成腔内可控的SPM效应，并引入适当的负GVD，将脉冲宽度从30fs压缩至16fs，相应的脉冲压缩率为47。
English Description：
It is reported that the addition of nonlinear refractive index to a titanium doped sapphire ring laser results in a controllable SPM effect in the cavity of SF-57 glass with a larger n2, and an appropriate negative GVD is introduced to compress the pulse width from 30fs to 16fs, resulting in a corresponding pulse compression rate of 47