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钛宝石（Ｔｉ：Ａｌ＿２Ｏ＿３被非稳望远镜腔的调Ｑ倍频Ｎｄ：ＹＡＧ激光器泵浦，在限制能量的条件下，得到了基横模的输出，在保持基模情况下，抖效率２５％，总转换效率达１７％。对同一付腔镜，波长调节范围在７６０ｎｍ～８３０ｎｍ之间。非稳腔泵浦体积大于模体积，望远镜光路系统的近衍射输出光束在Ｂｒｅｓｔｅｒ窗上损耗较小，因而斜效率随泵浦能量增大而增加，由于布儒斯特窗和色散棱镜的象散作用，基模光斑为椭圆。可调谐钛宝石激光器光腔的象散公式已得到。除此而外，还发现巨脉冲泵浦可能有强烈的热透镜效应。
Titanium (Ti: Al_2O_3) was pumped by a Q-switched Nd: YAG laser with a non-stationary telescope cavity. The output of the fundamental transverse mode was obtained under the condition of limiting the energy. Under the condition of maintaining the fundamental mode, the jitter efficiency was 25% The total conversion efficiency of 17% .For the same lap mirror, the wavelength adjustment range between 760nm ~ 830nm.Unstable cavity pumping volume is greater than the mold volume, the telescope optical system near diffraction output beam loss in the Brester window less, and therefore The slope efficiency increases with the increase of the pump energy, and the astigmatism of ellipsoid due to the astigmatism of Brewster’s window and dispersion prism has been obtained. Astigmatic formulas of tunable Ti: sapphire laser cavity have been obtained. In addition, It has also been found that giant pulse pumping may have a strong thermal lensing effect.