Approximate Explicit Solution for Cascaded Raman Lasers
- 信息技术－已发表论文 
中文摘要: 利用线性模型求出了级联掺磷拉曼光纤激光器各级光输出功率的显式近似解.首先定义了各级光的几何平均功率 ,然后利用零级光的几何平均功率在阈值处连续求出了阈值表达式 ,在此基础上 ,假设输出泵浦功率曲线在整个输入功率区间是分段线性的 ,以此来逼近求出的超越方程 ,并求出了二者之间相对误差的表达式.模拟结果表明 ,此假设在光 纤长度和输出光纤光栅反射率的很大变化范围内均近似成立 ,获得的结果对级联拉曼激光器的简化计算和设计具有较好的指导意义.英文摘要：Abstract : In this paper ,the approximate explicit solution of optical output power for P2doped cascaded Raman fiber lasers was ac2 quired by linear model . The paper defined average powers first ,and the threshold expressions were obtained by continuity on average power of zero-order light . And then the output power curves in the whole range of input pump power were assumed to be piecewise linear ,in order to approach the transcendental equation which had been obtained. Lastly we got the relative error expression. The simulation showed that the assumption was approximate satisfied in the large range of the fiber length and the reflectivity of fiber grating. The result s provided the bet ter guide to simplify the calculation and the design on the cascade Raman lasers.