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由跃迁速率方程推出了三能级系统的激光阈值和斜率效率解析式.根据测试的吸收谱,计算了YAG晶体中Er3+离子的吸收截面.分析了1.6μm波长的激光特征.The analytical formulas of laser threshold,slope efficiency of a three-energy-level system are deduced from rate-equations of transitions.The absorption cross section of Er3+ ions in YAG crystal is calculated according to measured absorption spectrum.The characteristics of laser at 1.6μm wavelength are analysed.
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