Theoretical and experimental investigations of small-signal gain for a diode-pumped Q-switched Cr:LiSAF laser
Theoretical and experimental investigations of small-signal gain for a diode-pumped Q-switched Cr:LiSAF laser
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DOI：
10.1109/3.552268
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发表时间：
1997-02
影响因子：
2.5
通讯作者：
F. Balembois;F. Falcoz;F. Kerboull;F. Druon;P. Georges;A. Brun
中科院分区：
文献类型：
--
作者：
F. Balembois;F. Falcoz;F. Kerboull;F. Druon;P. Georges;A. Brun
我们提出了一个理论模型，证明上转换和热猝灭的荧光强烈限制小信号增益连续泵浦Cr：LiSAF激光器。我们有一个很好的协议与实验测量的小信号增益获得一个新的简单的方法。然后，我们优化了增益的Cr：LiSAF激光器由两个400 mW的红色二极管泵浦。当抽运光斑在晶体内部形成圆形，Cr：LiSAF晶体两侧抽运时，在600 mW抽运功率下获得最大增益1.11。在Q开关操作中，该激光器产生800和900 nm之间的可调谐脉冲（在10 kHz时高达6.5 /spl mu/J）。
We present a theoretical model proving that up-conversion and thermal quenching of fluorescence strongly limit small-signal gain in a CW pumped Cr:LiSAF laser. We have a good agreement with experimental measurements of small-signal gain obtained with a new simple method. We have then optimized the gain in a Cr:LiSAF laser pumped by two 400-mW red diodes. The highest gain, 1.11 at 600 mW of absorbed pump power, is obtained if the pump spot is circularized inside the crystal and if the Cr:LiSAF is pumped on both sides. In Q-switched operation, this laser produces tunable pulses (up to 6.5 /spl mu/J at 10 kHz) between 800 and 900 nm.