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Passive Q-switching of a Tm:YLF laser with a Co2+ doped silver halide saturable absorber

机译:具有Co2 +掺杂的卤化银可饱和吸收剂的Tm:YLF激光器的无源Q开关

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We report a successful passive Q-switching of a Tm:YLF laser operating at lambda = 1.9 mu m, using a Co2+:AgCl0.5Br0.5 saturable absorber. Approximately 200-ns long, 150 mu J pulses were obtained. Increase in pump energy resulted in repetitive pulsing, with a repetition rate approximately proportional to the pump pulse energy. Room-temperature optical transmission saturation curves measured in similar to 1-mm thick Co2+:AgCl0.5Br0.5 plates yielded a ground state absorption cross section sigma(gs) = (7.8 +/- 0.5) x 10(-18) cm(2), and an excited state absorption cross section sigma(es) = (3.3 +/- 0.3) x 10(-18) cm(2), at lambda = 1.9 mu m. The lifetime of the A(2)(F-4) second excited-state of the octahedral 0 symmetry was tau* = (0.6 +/- 0.06) ns. (C) 2016 Elsevier B.V. All rights reserved.
机译:我们报道了使用Co2 +:AgCl0.5Br0.5饱和吸收剂在λ= 1.9微米工作的Tm:YLF激光器的成功无源Q开关。获得约200 ns长的150μJ脉冲。泵浦能量的增加会导致重复脉冲,重复频率大约与泵浦脉冲能量成正比。在类似于1毫米厚的Co2 +:AgCl0.5Br0.5板中测量的室温光透射饱和曲线得出的基态吸收截面sigma(gs)=(7.8 +/- 0.5)x 10(-18)cm( 2),在λ= 1.9微米时的激发态吸收截面sigma(es)=(3.3 +/- 0.3)x 10(-18)cm(2)。八面体0对称性的A(2)(F-4)第二激发态的寿命为tau * =(0.6 +/- 0.06)ns。 (C)2016 Elsevier B.V.保留所有权利。

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