设计了一组双折射滤光片,由3片石英晶体组成,光轴倾角均为0°,基片厚度为0.45mm,3片厚度比为1:4:10。用于自行搭建的钛宝石激光器调谐实验,发现双折射滤光片绕其法线旋转约20°,输出激光中心波长可由760nm连续变化到845nm,并且线宽均小于2nm,最窄能达到0.73nm。泵浦能量465mJ时,800nm输出能量为85mJ。最大斜率效率为32.1%,最大光-光转换效率约为18.3%。双折射滤光片具有较好的调谐和压线宽作用。 A series of birefringent filters were designed, which consisted of 3 quartz crystals. The optical axis angles were all 0 °. The thickness of the substrate was 0.45 mm. The thickness ratio of the three films was 1: 4: 10. For self-built titanium sapphire laser tuning experiments found that the birefringent filter about its normal rotation of about 20 °, the output laser center wavelength can be continuously changed from 760nm to 845nm, and the line width are less than 2nm, the narrowest can reach 0.73nm . When the pump energy is 465mJ, the output energy of 800nm ​​is 85mJ. The maximum slope efficiency is 32.1% and the maximum light-to-light conversion efficiency is about 18.3%. Birefringent filters have better tuning and pressure line width effect.