级联光纤参量放大器的增益特性分析

Research on Gain Properties of Cascaded Fiber Optical Parametric Amplifier

摘要:

首先介绍了级联结构光纤参量放大器的工作原理, 即通过两种光纤色散补偿来平坦信号输出增益。其次推导出小信号近似下单泵浦级联光纤参量放大器的信号输出增益表达式, 并在此基础上利用Matlab软件对影响增益特性的各个参数进行数值分析。结果表明, 级联光纤参量放大器的峰值增益与增益带宽, 受到分段数、泵浦光功率、泵浦波长、色散补偿光纤(DCF)长度、高非线性光纤(HNLF)的零色散波长、HNLF长度、HNLF非线性系数和HNLF色散斜率的影响。

Abstract:

Firstly, the principles of fiber-optic parametric amplifier with cascaded structure were introduced. Then, the signal output gain expression about the single-pumped and cascaded fiber optic parametric amplifier was derived at small signal approximation. The gain characteristics were analyzed by using Matlab software. The results show that the peak gain and gain bandwidth of the cascaded fiber parametric amplifier are affected by the number of segments, pump power, pump wavelength, DCF length and high nonlinear fiber (HNLF) zero-dispersion wavelength, HNLF length, HNLF nonlinear coefficient and HNLF dispersion slope.