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为了对同向抽运光纤喇曼放大器的功率转换效率进行研究,由耦合方程出发,采用龙格-库塔算法的数值模拟方法,详细分析了所有物理因素对同向抽运光纤喇曼放大器功率转换效率的影响。结果表明,功率转换效率先随着光纤长度的增加而增加,当增加到最大值时保持数值不变;并且功率转换效率也随着初始信号光功率、光纤喇曼增益系数、信号光损耗系数的增加而增加,但随着光纤有效面积、抽运光损耗系数、抽运光与信号光的频率比的增加而减小;功率转换效率和初始抽运光功率呈抛物线曲线关系。这对同向抽运光纤喇曼放大器功率转换效率的进一步研究以及光纤喇曼放大器的相关研究有一定参考意义。
In order to study the power conversion efficiency of the fiber laser Raman amplifier in the same direction, based on the coupled equation, the numerical simulation method of Runge-Kutta algorithm is used to analyze the effect of all the physical factors on the power of Raman amplifier Effect of conversion efficiency. The results show that the power conversion efficiency first increases with the increase of the fiber length, and keeps the same value when it increases to the maximum value. The power conversion efficiency also varies with the initial signal power, fiber Raman gain coefficient, signal light loss coefficient But decreases with the increase of the effective area of fiber, loss factor of pumping light and frequency ratio of pumping light and signal light. The power conversion efficiency and initial pumping light power have a parabolic curve relationship. This researches the power conversion efficiency of the fiber laser Raman amplifier in the same direction and the related research of fiber Raman amplifier.