种子光线宽影响端面抽运碱金属蒸气放大器的输出特性

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。

Abstract

In recent years, the diode pumped alkali laser (DPAL) has been rapidly developed as a new laser source. The master oscillator power-amplifier (MOPA) system is one of the most feasible engineering methods to achieve the high power scaling of DPAL. Comparing with traditional lasers, DPAL′s linewidths of both absorption and emission are extremely narrow. Therefore, the linewidth of a seed laser is one of the most important factors that effects the output characteristics of DPAL-MOPA. A theoretical microcosmic kinetic mode is established for an end-pumped DPAL-MOPA system. The linewidth of seed laser and the spectral distribution of emission cross-section are taken into account in the calculation process. The influences of linewidth of seed laser on the features, including the output power, output linewidth, extraction efficiency, gain factor, and pump absorption, are calculated and analyzed in detail. The research is helpful in construction of a power-scaled DPAL-MOPA system.

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种子光线宽影响端面抽运碱金属蒸气放大器的输出特性

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