论文部分内容阅读
实验研究了以钛宝石薄片作为增益介质的再生激光放大器,其钛宝石薄片厚度为2mm,前表面作为通光面,镀有对抽运激光和放大激光增透的高阈值双色介质膜,后表面作为反射面,镀有对抽运激光和放大激光高反的高阈值双色介质膜,晶体对抽运激光的吸收率大于80%(1次透射和1次反射)。在再生腔中,钛宝石晶体不仅作为增益介质,也作为反射腔镜,简化了放大腔腔型。钛宝石晶体采用端面冷却的方式,极大地降低了晶体中的热效应,从而提高了放大脉冲激光的光束质量,在此基础上获得了能量为5.2mJ的放大激光脉冲输出,能量转换效率达到11.5%,放大激光光束质量因子M2小于1.2。
Experimental study of a titanium sapphire thin film as the gain medium regeneration laser amplifier, the titanium sapphire sheet thickness of 2mm, the front surface as a light-passing surface, plated with pumping laser and amplification laser enhanced threshold of two-color medium film, the rear surface As the reflecting surface, a high threshold two-color dielectric film is plated on the pumping laser and the amplification laser. The absorption rate of the laser to the pumping laser is more than 80% (primary transmission and primary reflection). In the regeneration chamber, titanium sapphire crystal not only as a gain medium, but also as a reflection mirror, simplifying the amplification cavity. Titanium crystal with end-face cooling mode, which greatly reduces the thermal effect of the crystal, thereby enhancing the pulsed laser beam amplification quality, obtained on this basis, the energy of 5.2mJ amplified laser pulse output, the energy conversion efficiency of 11.5% , Enlarge laser beam quality factor M2 is less than 1.2.