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简要概述了半导体激光器抽运碱金属蒸气激光器(DPAL)的研究背景与独特优势,介绍了DPAL主振荡功率放大器(MOPA)在国内外的发展现状。构建了基于碱金属原子三能级受激吸收-受激辐射理论的端面抽运DPALMOPA系统的速率方程模型并进行了系统的理论计算,分析了DPAL-MOPA的输出功率和提取效率随蒸气池温度、蒸气池长度、抽运功率和抽运光束的束腰半径的变化特性。与已发表的实验结果对比后发现,理论计算结果和实验数据十分吻合,验证了该理论模型的有效性。该研究对构建定标放大的DPAL系统具有理论指导意义。
The research background and unique advantages of the pumped alkaline laser (DPAL) are summarized. The development of the DPAL main oscillating power amplifier (MOPA) at home and abroad is introduced. The rate equation model of the DPALMOPA system based on the three-level excited-excited absorption-stimulated emission theory of alkali metal atoms was constructed and systematically calculated. The analysis of the output power and extraction efficiency of DPAL-MOPA with the temperature of the steam pool , The length of the sump, the pumping power, and the beam waist radius of the pumping beam. Compared with the published experimental results, it is found that the theoretical calculation is in good agreement with the experimental data, which verifies the validity of the theoretical model. The research is of theoretical significance for constructing a scaled-up DPAL system.