两种相位共轭技术对光纤中超短光脉冲传输失真的补偿比较

Comparison of two phase conjugation techniques for distortion compensation of ultrashort optical pulse transmission in optical fibers

通过理论分析和数值计算,比较了时域相位共轭技术和频域相位共轭技术对光纤中由于色散和非线性引起的超短光脉冲传输失真的补偿效果。结果表明,在仅考虑群速度色散和自相位调制效应时,时域相位共轭技术与频域相位共轭技术的补偿效果一致;当需要考虑三阶色散时,频域相位共轭技术的补偿效果优于时域相位共轭技术;当需要考虑脉冲内拉曼散射时,时域相位共轭技术的补偿效果优于频域相位共轭技术;当上述四种效应同时考虑时,频域相位共轭技术的补偿效果略优于时域相位共轭技术。同时还对上述两种补偿技术的应用进行了讨论。

By theoretical analysis and numerical calculation,we have made a comparison between two phase conjugation techniques,i.e.,temporal phase conjugation and spectral phase conjugation when use them for distortion compensation of ultra-short optical pulse transmission in optical fibers.Results show that：when only consider the group velocity dispersion and self-phase modulation,the distortion compensation of temporal phase conjugation and spectral phase conjugation are the same;When the third order dispersion is needed to be considered,the distortion compensation of spectral phase conjugation is better than temporal phase conjugation;When the inter-pulse Raman scattering is to be considered,the distortion compensation of temporal phase conjugation is better than spectral phase conjugation;When considering the four effects mentioned above,the distortion compensation of spectral phase conjugation is a little better than temporal phase conjugation.Discussion about the application of these two compensation techniques is also presented in this article.