Abstract A 3.8μm secondary mid-infrared parametric amplifier based on MgO:PPLN crystal was analyzed. At a repetition frequency of 140kHz and an initial amplified signal source power of 1W, the maximum output power of the first-level 3.8μm laser is 3.03W. Perform second-level OPA experiment to obtain higher output power. Under the premise that the initial amplified signal source power is 2.5W, the output power of the 3.8μm laser is 4.69W, the output wavelength line width is 3.58nm, the optical-to-optical conversion efficiency is 7.3%, and the beam quality factor M2= 1.82, The 3.8μm laser calibration amplification output was achieved.

中文翻译：

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基于MgO:PPLN晶体的3.8μm中红外光参量放大器

摘要 分析了一种基于MgO:PPLN晶体的3.8μm二级中红外参量放大器。在140kHz的重复频率和1W的初始放大信号源功率下，一级3.8μm激光器的最大输出功率为3.03W。进行二级OPA实验以获得更高的输出功率。在初始放大信号源功率为2.5W的前提下，3.8μm激光器的输出功率为4.69W，输出波长线宽为3.58nm，光光转换效率为7.3%，光束品质因数M2=1.82，达到3.8μm激光校准放大输出。