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半导体激光器抽运碱金属激光器(DPAL)是近年来发展迅速的新型激光光源。DPAL的主振荡功率放大(MOPA)系统是实现DPAL高功率化的最理想工程手段之一。相对于传统激光器,DPAL的吸收和发射线宽非常窄,因此种子光的线宽是影响DPAL-MOPA输出特性的重要参数之一。建立端面抽运DPAL-MOPA系统的微观动力学理论模型,在计算步骤中考虑了种子光线宽与发射截面的波谱分布,详细计算和分析了种子光线宽对DPAL-MOPA系统的输出功率、输出线宽、提取效率、增益系数和抽运吸收等特性的影响,有助于将来定标放大高功率DPAL系统的构建。
Semiconductor lasers Pumped Alkali Metal Laser (DPAL) is a new type of laser light source that has developed rapidly in recent years. DPAL’s Main Oscillator Power Amplification (MOPA) system is one of the most ideal engineering tools for high-power DPAL. Compared to conventional lasers, the absorption and emission linewidth of the DPAL is very narrow, so the linewidth of the seed light is one of the important parameters that affect the output characteristics of the DPAL-MOPA. The theoretical model of DPAL-MOPA system is established. The spectral distribution of seed light and emission cross section is taken into account in the calculation step. The output power of DPAL-MOPA system is calculated and analyzed in detail. Wide, extraction efficiency, gain factor and pumping absorption characteristics, contribute to the future scaling amplification high power DPAL system construction.