摘要
根据光纤中磁光效应与非线性效应的微扰理论,推导了磁光光纤中光脉冲的非线性耦合模方程,比较了修正的分步傅里叶算法中磁光效应的时域和频域处理方案,表明了在步长足够小的情况下,两种方案的结果一致.分析了磁光效应、光纤非线性以及色散对光脉冲传输特性的影响,通过改变磁光耦合强度,不但可以灵活控制脉冲形状,还可以改变非线性引起的频率啁啾大小,有助于实现基于光脉冲展宽的动态整形功能.本文给出的理论分析方法,有助于开发可用于光纤通信、光纤传感等领域的基于非线性磁光光纤的新型磁光信息处理器件.
According to the perturbation theory for magneto-optic（MO）effects and nonlinear effects,the nonlinear coupled-mode equations are derived for optical pulses propagating in magneto-optic nonlinear fibers.The time and frequency domain schemes of magneto-optic effects in the modified split-step Fourier method are brought into comparison,and it is found that both of them are the same,when the step-length is short enough.According to the coupling of magneto-optic effects,nonlinear effects and dispersion,the propagation characteristics of optical pulses in the MO fibers are analyzed in detail.By approporiately adjusting the MO coupling coefficient,the pulse shape can be flexiblely controlled,and the frequency chirp related to the nonlinear effects is also be changed,which is useful for the dynamic reshaping function based on pulse widening.The theoretical analysis results presented in the article may help to develop novel magneto-optic information processing devices with applications to the fields of fiber optic communications and fiber optical sensors etc.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2010年第10期1862-1866,共5页
Acta Photonica Sinica
基金
国家高技术研究发展计划(863)(2009AA01Z216)
新世纪优秀人才支持计划资助
关键词
磁光光纤
光纤非线性效应
分步傅里叶算法
Magneto-optic fibers
Nonlinear effects
Modified split-step Fourier method
