High-power diode-pumped Yb-doped fiber laser at 1150 nm

A model of steady-state rate equations including amplified spontaneous emission for long-wavelength Yb doped fiber laser is set up, which provides design principle for a practical laser system. We demonstrate a diode-pumped all-fiber Yb-doped fiber laser at 1150 nm with an output power of 33.6 W, the optical efficiency is 60%.     

窄带高功率微波效应测试中功率密度测量不确定度评估

针对窄带高功率微波（HPM）效应试验的辐射场准确测试需求,分析补充了功率密度参数的测量不确定度主要分量,提出了一个参数更为全面的乘式测量不确定度评估模型。采用B类评估方法,根据相关标准和信息对各分量进行了一组赋值,计算得到了相对形式的分量标准不确定度。给出了评估测试环境影响、位置偏差等分量不确定度半宽度的实验方法,为HPM效应功率密度参数测量不确定度的合理评定提供了参考,为实现其全部分量基于实测数据客观评估测量不确定度提供了操作方法。