Based on the simple and effective modle of Raman fiber amplifier, Raman gains under different parameters are computed with the help of average power and shooting method. 摘要借助簡(jiǎn)化的拉曼光纖放大器數學(xué)模型，利用平均功率法和打靶法分別計算出了不同參數下多波長(cháng)泵浦的拉曼增益。
The encircled-power method is introduced to define the beam width and real focal plane of focused sinh-Gaussian beams, thus their focal shift can be determined. 使用環(huán)圍功率法定義束寬和實(shí)際焦面，由此可以決定聚焦雙曲正弦高斯光束的焦移。
