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Efficient acousto-optic Q switching of Er:YSGG lasers at 2.79-μm wavelength

机译:波长为2.79μm的Er:YSGG激光的高效声光Q转换

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A flash-lamp-pumped Er:Cr:YSGG laser at 2.79-μm wavelength has been acousto-optically Q switched. The Q-switched pulse energy and duration depend on pump pulse level and relative Q-switching time. Limits of single-pulse operation with the given acousto-optic diffraction efficiency have been determined. Resonator length, position of the Q switch, and output mirror reflectivity have been varied to obtain high pulse energy and the shortest pulse duration in the TEM_(00) transverse laser mode. A maximum singlepulse energy of 27 mJ and a minimum pulse duration of 120 ns were obtained with an output mirror reflectivity of approximately 25%. The highest Q-switched single-pulse energy amounted to 52% of the free-running, fundamental mode output pulse energy.
机译:闪光灯泵浦的波长为2.79μm的Er:Cr:YSGG激光器已经进行了声光Q转换。调Q脉冲能量和持续时间取决于泵脉冲电平和相对的Q切换时间。在给定的声光衍射效率下,单脉冲操作的极限已经确定。改变了谐振器的长度,Q开关的位置以及输出镜的反射率,以在TEM_(00)横向激光模式下获得高脉冲能量和最短脉冲持续时间。获得的最大单脉冲能量为27 mJ,最小脉冲持续时间为120 ns,输出镜反射率约为25%。最高的Q开关单脉冲能量占自由运行的基本模式输出脉冲能量的52%。

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