级联掺磷光纤喇曼激光器的解析优化  

Analytic Optimization of P-doped Cascaded Raman Fiber Lasers

作　　者：黄朝红[1] 蔡志平[1] 叶陈春[1] 许惠英[1] 黄文财[1] 

机构地区：[1]厦门大学信息科学与技术学院电子工程系,福建厦门361005

出　　处：《光子学报》2007年第8期1384-1388,共5页Acta Photonica Sinica

基　　金：福建省科技计划重大项目(2004HZ01-1-3);厦门大学科技创新项目(XDKJCX20041003)资助

摘　　要：讨论了二级级联喇曼光纤激光器的解析解和优化设计.通过引入几何平均功率、增益因子和归一化光纤有效长度,将描述泵浦光和斯托克斯光沿喇曼增益光纤分布的微分方程组简化成代数方程组,在对泵浦光采用线性传播近似后,获得了二级级联喇曼激光器的解析解.所获得的解析解同数值模拟结果吻合得很好.利用该解析解可方便和快速地讨论级联喇曼激光器的优化设计,计算不同泵浦功率下的最佳光纤长度、输出光纤光栅反射率和转换效率.泵谱功率越大,最佳光纤长度越短,最佳输出光纤光栅反射率越小.Optimization of P-doped cascaded Raman fiber lasers is discussed analytically. The differential equations depicting the distribution of pump and Stokes radiations along Raman fiber are simplified to the algebraic equations by introducing variables： average powers, gain factors and effective fiber length. An approximate analytic solution is obtained while supposing that pump beam propagates linearly along fiber. The proposed analytic solution shows excellent agreement with numerical simulation. Moreover, optimal design of the laser is discussed using the proposed solution. The optimal values of fiber length, reflectivity of output fiber Bragg grating and power conversion efficiency are obtained under different pump power. The optimal fiber length and reflectivity of output FBG decrease with increasing pump power.

关 键 词：喇曼光纤激光器 解析解 优化设计 

分 类 号：TN242[电子电信—物理电子学] TN212