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文章根据平稳重调脉冲(SRP)在梳状光纤(CPF)结构中的压缩原理,对色散渐减光纤(DDF)的色散特性进行设计,结果发现该色散渐减光纤的色散特性呈线性递减.对于平稳重调脉冲其压缩比与功率比等于光纤始末两端二阶色散系数的比值.当色散渐减光纤的斜率足够小时,无啁啾基阶孤子可以近似为平稳重调脉冲,当色散渐减光纤的色散斜率较大时,无啁啾基阶孤子不能近似为平稳重调脉冲.当基阶孤子带有与光纤色散斜率成正比的线性啁啾时,脉冲的压缩比与功率比更接近于光纤始末两端二阶色散系数的比值.说明带有线性啁啾的基阶孤子比不带啁啾的基阶孤子更接近于平稳重调脉冲.
In this paper, the dispersion of diminishing dispersion fiber (DDF) is designed according to the compression principle of smooth tuning pulse (SRP) in combed fiber (CPF). The results show that the dispersion characteristic of decreasing dispersion fiber decreases linearly. The ratio of the compression ratio to the power ratio is equal to the ratio of the second-order dispersion coefficient to the beginning and end of the fiber for the smooth-tuning pulse. When the slope of the dispersion-decreasing fiber is small enough, the chirp-free fundamental soliton can be approximated as a smoothing- For fiber-less fiber, the chirp-less order soliton can not be approximated as a smooth-tuned pulse.When the fundamental-order soliton has a linear chirp that is proportional to the fiber dispersion slope, the compression ratio of the pulse is closer to the power ratio The ratio of the second-order dispersion coefficients at both ends of the fiber shows that the first-order solitons with linear chirp are closer to the smooth-tuned pulses than the first-order solitons without chirp.