摘要
利用非线性方法可以得到级联掺磷拉曼光纤激光器的二阶近似解。将描述抽运光和斯托克斯(Stokes)光沿光纤分布的微分方程组简化成代数方程组,在此基础上对抽运光采用二阶非线性近似得到了不同输入抽运功率情况下的近似解,并求出了在二阶非线性近似下的一级Stokes光和二级Stokes光的阈值表达式。利用得到的二阶近似解同一般的数值解法作比较,结果表明两者吻合得很好。一方面,对于双波长输出的级联掺磷拉曼光纤激光器,二阶方法比线性方法更加精确,更接近于一般的数值解;另一方面,该方法有效提高了数值运算速度,优于一般的数值方法。
The second-order approximate solution of P-doped cascaded Raman fiber lasers were obtained by nonlinear method. The differential equations depicting the distribution of pump and Stokes radiations along Raman fiber were simplified to the algebraic equations, and then the approximate solution under different input pump powers by second-order nonlinear method and the threshold expressions was obtained. The second-order solution agrees well with the numerical simulation. On the one hand, the second-order method was more accurate than the linear method and it could provide better guidance to the experimental design in regard to P-doped cascaded Raman fiber lasers for dual wavelength outputs. On the other hand, the method effectively improves the numerical computational speed, and is superior to general numerical methods.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2008年第10期1449-1454,共6页
Chinese Journal of Lasers
基金
国家光电子晶体材料工程技术研究中心开放基金(2005DC105003)
福建省青年人才创新项目(2007F3100)
福建省自然科学基金重大项目(2002F011)资助课题
关键词
非线性光学
受激拉曼散射
拉曼光纤激光器
二阶近似解
阈值
双波长输出
nonlinear optics
stimulated Raman scattering
Raman fiber laser
second-order approximate solution
threshold
dual-wavelength outputs
作者简介
蔡伟琦(1983-),男,福建人,硕士研究生,目前主要从事级联拉曼激光器的研究。Email:clementcwql@hotmail.com
通信联系人。E—mail:hch@xmu.edu.cn
导师简介:蔡志平(1965~),男,福建人,教授。博士生导师,目前研究方向为光电技术、激光应用工程。E-mail:zpcai@xmu.edu.cn