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首页> 外文期刊>Optical fiber technology >Influences Of Writing-beam Size On The Performances Of Dispersion-free Multi-channel Fiber Bragg Grating
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Influences Of Writing-beam Size On The Performances Of Dispersion-free Multi-channel Fiber Bragg Grating

机译：写入光束大小对无色散多通道光纤布拉格光栅性能的影响

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摘要

Analysis for the influences of writing-beam size on the performances of a dispersion-free multi-channel fiber Bragg grating (FBG) is presented. It is found that the writing-beam size strongly affects the response of this kind of grating and would make the grating spectrum considerably distorted once the beam size of the UV light is too large to form the complex index-modulation pattern within the fiber core. A novel design method has been proposed to compensate this beam-size effect and a nine-channel dispersion-free FBG with identical spectrum response has been obtained. This compensation method could decrease the tolerance for the demand of small writing-beam size and can be easily extended to the design and fabrication for most of the other complex FBGs.
机译：分析了写入光束尺寸对无色散多通道光纤布拉格光栅（FBG）性能的影响。已经发现，写入光束的尺寸强烈地影响这种光栅的响应，并且一旦紫外光的光束尺寸太大而不能在光纤芯内形成复杂的折射率调制图案，则会使光栅光谱明显失真。提出了一种新颖的设计方法来补偿这种光束大小效应，并获得了具有相同频谱响应的九通道无色散FBG。这种补偿方法可以减小对较小书写光束尺寸要求的容忍度，并且可以很容易地扩展到大多数其他复杂FBG的设计和制造。

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