Observation of Laser Oscillation from CaGa 2S 4:Eu 2+
Observation of Laser Oscillation from CaGa 2S 4:Eu 2+
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CaGa 2S 4:Eu 2 激光振荡的观察
DOI：
10.1143/jjap.36.l857
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发表时间：
1997
影响因子：
1.5
通讯作者：
R. Dzhabbarov
中科院分区：
文献类型：
--
作者：
S. Iida;Tamao Matsumoto;N. Mamedov;G. An;Y. Maruyama;A. I. Bairamov;B. Tagiev;Oktai Tagiev;R. Dzhabbarov
本文首次报道了CaGa_2S_4：Eu ~（2+）（1at%）单晶的激光振荡现象。用光子能量约为2.48eV的脉冲染料激光束从另一未涂覆侧激发液氮冷却的薄薄片（0.8mm厚），该薄片的一个平坦表面涂覆有铝以增加反射率。当输入功率密度超过约10 MW/cm 2的阈值时，从样品中出现具有约2.19 eV的尖锐谱线的定向光束。发现该激光器具有延伸至~200 A的有趣的波长可调谐性，这可能与该材料中Eu 2+发射的宽增益谱有关。
The first observation of laser oscillation from a single crystal of CaGa2S4:Eu2+ (1 at%) is described in this report. A liquid nitrogen cooled thin platelet (0.8 mm thick), whose one flat surface was coated with aluminum to increase the reflectivity, was excited from the other uncoated side with a pulsed dye laser beam having a photon energy of around 2.48 eV. When the input power density exceeded a threshold value of ~10 MW/cm2, a directional beam having a sharp spectral line at around 2.19 eV emerged from the sample. This laser was found to have interesting wavelength tunability extending to ~200 A, possibly related to the broad gain spectrum of Eu2+ emission in this material.