初始啁啾补偿光纤色散效应的数值研究

以具有初始啁啾的高斯脉冲在单模光纤中的传输为例,分析、计算了线性初始啁啾对光纤二阶、三阶色散效应的影响,指出了初始啁啾进行色散补偿的适用范围和条件,并对二阶、三阶色散完全补偿光纤链路中40Gbit/s短脉冲传输效果进行了数值计算,结果表明,依据入射功率选择合适的初始啁啾,能使脉冲稳定传输距离大幅提升.

Numerical study of initial chirp compensating for fiber dispersion function

Taking the transmission effect of Gaussian pulse with initial chirp passing through a single-mode fiber as an example,the respective relations between linear initial chirp and first-order and high-order dispersion function of single-mode fiber are discussed systematically by means of theoretical analysis and numerical calculation.The sphere and conditions of applying initial chirp to dispersion compensation are pointed out.In a second order dispersion and third order dispersion compensation optical fiber links system,40Gbit/s Gaussian pulse transmission is simulated.It is concluded that as the second order dispersion compensation can avoid pulse broadening,the third order dispersion compensation can not only avoid pulse broadening but also eliminate pulse edges oscillating and temporal shift of pulse peak.