皮秒脉冲在光子晶体光纤中的压缩效应

为了研究初始啁啾和初始输入功率对脉冲压缩的影响,运用对称分步傅里叶方法数值模拟了皮秒高斯脉冲在光子晶体光纤中的传输过程.增大初始啁啾和输入功率可以得到更大的压缩因子,同时最佳光纤长度减小,它们之间基本成线性关系.并且在初始啁啾值和初始功率比较小时,在最佳光纤长度处,品质因子和压缩因子不是同时达到最大值.结果表明,若选取适当的光纤长度和初始峰值功率,可以实现啁啾脉冲在光子晶体光纤中的有效压缩.

Effect of picosecond pulse compression in photonic crystal fibers

A theoretical investigation with the method of splitstep Fourier was presented on the propagation of a picosecond pulse in photonic crystal fibers.The effect of initial chirp and power on pulse compression was simulated and analyzed.It was found that the compression factor and the compression quality factor increased with initial chirp and power,but optimum fiber length decreased.When the values of initial chirp and power were small,the compression factor and the compression quality factor didn't simultaneously achieve the optimum value.If an appropriate optical fiber length and initial peak power was selected,efficient pulse compression could be attained in photonic crystal fibers.