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首页> 外文期刊>Optical and quantum electronics >Designing suitable dispersion decreasing active fibers to generate parabolic pulses in presence of macrobending
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Designing suitable dispersion decreasing active fibers to generate parabolic pulses in presence of macrobending

机译：设计合适的降低色散的活性纤维，以在存在大弯曲时产生抛物线脉冲

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摘要

The present work deals with the performances of straight and bent active normal dispersion decreasing fibers (NDDFs) to create parabolic pulses. Since these optical fibers are generally kept in the form of fiber rolls, they may suffer from unavoidable bend losses. For the NDDFs, the core radius and hence transverse field distribution inevitably change along the fiber length; thereby bend loss is no longer an invariable quantity throughout the NDDF length. The spatial variation of bend loss for a parabolic index NDDF is incorporated for the first time to investigate the effect of bend loss analytically and numerically on parabolic pulse generation. It is illustrated that suitable choice of relative refractive index difference and bend radius of curvature of the fibers would lead to parabolic pulse formation by a bent NDDF. The comparative study on the straight and bent NDDFs will be helpful for the fiber optic manufacturers to design and fabricate NDDFs with proper choice of optimized parameters and index differences so that parabolic pulses can be generated even under the influence of practically unavoidable bending.
机译：目前的工作涉及直线和弯曲的主动法向色散减小光纤（NDDF）产生抛物线脉冲的性能。由于这些光纤通常以纤维卷的形式保持，因此它们可能遭受不可避免的弯曲损失。对于NDDF，纤芯半径和因此的横向场分布不可避免地会沿着光纤长度发生变化。因此，弯曲损耗不再是整个NDDF长度的不变量。首次结合了抛物线折射率NDDF的弯曲损耗的空间变化，以分析和数值方式研究弯曲损耗对抛物线脉冲生成的影响。示出了适当选择纤维的相对折射率差和弯曲曲率半径将导致通过弯曲的NDDF形成抛物线脉冲。对直线型和弯曲型NDDF的比较研究，将有助于光纤制造商设计和制造具有最佳参数和折射率差异的正确选择的NDDF，从而即使在实际上不可避免的弯曲影响下也可以产生抛物线形脉冲。

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