双向多波长泵浦喇曼光纤放大器的优化算法

在变步长的龙格库塔法的基础上,提出利用打靶法,通过先猜测再修正的逐渐逼近的方法来确定计算初始值,进而求解双向泵浦喇曼放大器的功率耦合方程。并利用此算法对三泵浦波长的喇曼放大器进行优化设计,选择泵浦波长分别为1427nm、1445nm和1466nm时进行数值模拟,得到了1dB带宽35nm左右的较好的增益平坦度。

Study of Optimal Algorithm of Multiple Wavelength Bi-direction Pumped Raman Amplifier

On the basis of the variable step Runge-Kutta method,a shooting algorithm is proposed.In this algorithm,the initial value is determined by means of gradual approximation,i.e.first guessing and second correction,and then the coupled power equation of a hi-direction pumped fiber Raman amplifier is solved.The algorithm is used to implement the optimal design of a three wavelength pumped Raman amplifier and the numerical simulation is done at the selected wavelengths of 1427nm,1445nm and 1466nm respectively.A good gain flatness of 35nm is achieved for a 1dB bandwidth.