In order to improve the optical-optical conversion efficiency of the pulse amplification system model , the output characteristics of the dual-pass pulse amplification were studied by means of modeling and simulation .From the transmission characteristics , the relationship between output power and pump power , the relationship between output single pulse energy and pulse repetition frequency , and the relationship between conversion efficiency and repetition rate were obtained.The optical to optical conversion efficiency was 29.1%when the repetition frequency was 40kHz.Therefore, this dual-pass pulse amplification model improved the efficiency of energy conversion .%为了提高脉冲放大系统模型的光光转换效率，采用建模及仿真的方法研究了双程脉冲放大模型的输出特性，得到了得到双程脉冲放大系统输出功率与抽运功率的关系、输出单脉冲能量与脉冲的重复频率的关系，以及双程放大系统转换效率与重复频率的关系。结果表明，在重复频率为40 kHz时，仿真得到该脉冲激光放大模型的光光转换效率达到了29．1％。该双程脉冲放大模型有效地提高了能量转换效率。
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