摘要
对色散渐减光纤(DDF)构成的马赫-曾德尔干涉仪(MZI)中的孤子效应脉冲压缩进行了数值研究,该方法同时利用了DDF中的高阶孤子压缩和MZI的非线性开关特性。计算结果表明,该方法不仅能获得比DDF绝热压缩大得多的压缩比,而且可以压缩DDF绝热压缩技术所不能压缩的宽脉冲。对于宽度为20ps的输入脉冲,压缩比高达76.4。研究还表明,压缩结果对于MZI的设计误差或输入脉冲峰值功率的波动不敏感;而DDF中的高阶效应(如拉曼自频移和三阶色散)对压缩结果的影响也只有当压缩脉冲短于100fs时才变得不可忽略。
Soliton-effect optical pulse compression in a dispersion-decreasing fiber（DDF） based on Mach-Zehnder interferometer（MZI） is studied numerically.The scheme utilizes both the higher-order soliton compression and the nonlinear switching effects within the MZI.Numerical results show that the scheme cannot only permit much more efficient pulse compression than the DDF-based adiabatic soliton compression technique,but also compress wide pulse which will be impossible with the adiabatic soliton compression technique.For a 20-ps input pulse,the compression ratio by the present scheme is as high as 76.4.Results also show that the compression is quite tolerant of small variation of initial parameters such as the arm length of the MZI,the input to output dispersion ratios of the two arms,and the peak power of the input pulse.The influence of higher-order effects such as Raman self-frequency shift and the third-order dispersion on pulse compression is also investigated.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2011年第4期245-252,共8页
Acta Optica Sinica
基金
广东省自然科学基金(06029820)资助课题
关键词
光通信
光孤子
光脉冲压缩
色散渐减光纤
马赫-曾德尔干涉仪
拉曼自频移
三阶色散
optical communications
optical solitons
optical pulse compression
dispersion-decreasing fiber
Mach- Zehnder interferometer
Raman self-frequency shift
the third-order dispersion
