啁啾超高斯脉冲半导体激光器频谱的补偿修正研究  

Compensation and correction of spectrum of chirped super-Gaussian pulse semiconductor lasers

作　　者：李科[1] 余震虹[1] 高磊[1] 戴国强[1] 

机构地区：[1]江南大学物联网工程学院,江苏无锡214122

出　　处：《量子电子学报》2012年第4期481-484,共4页Chinese Journal of Quantum Electronics

摘　　要：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10ps,峰值功率为30W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0.5m的DSF可以最大程度上消除该初始脉冲的"红移"啁啾。Compensation and correction of spectrum of picosecond chirped super-Gaussian pulses generated by semiconductor lasers using a dispersion-shifted fiber（DSF） were achieved.Appropriate spectral compression can reduce inter-symbol interference and prevent the signal distortion induced by excessive spectral stretching,thus facilitating steady propagation of super-Gaussian pulses to a certain extent and increasing propagation distance of optical fiber system.The spectral evolution of the super-Gaussian pulse was simulated numerically by symmetrical split-step Fourier method（SSFM） with initial chip of -3,pulse width of 10 ps and peak power of 30 W in the DSF.The results show that the DSF with length of 0.5 m can greatly eliminate ＂ red shift ＂ chirps of the initial pulse.

关 键 词：非线性光学 频谱补偿 对称分步傅里叶法 超高斯脉冲 消啁啾 

分 类 号：O437[机械工程—光学工程]