利用一段色散位移光纤(DSF)对半导体激光器产生的皮秒啁啾超高斯脉冲的频谱补偿修正,获得了较好的修正结果.适当压缩脉冲频谱可以减小码间干扰,防止频谱因过度展宽而导致信号脉冲失真,从而在一定程度上有利于超高斯脉冲的稳定传输,提高光纤系统的传输距离.研究时,采用对称分步傅里叶法(SSFM),数值模拟了初始啁啾为-3,初始脉宽为10 ps,峰值功率为30 W的啁啾超高斯脉冲,在DSF中传输时消啁啾的频谱演变过程.模拟结果表明,利用长度为0.5 m的DSF可以最大程度上消除该初始脉冲的“红移”啁啾.
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