全固三芯光子晶体光纤偏振分束器

Acta Photonica Sinica(2016)

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Abstract
设计分析了一种基于碲酸盐玻璃的全固态三芯光子晶体光纤偏振分束器.利用三芯光纤中存在的谐振耦合现象,调整光纤结构参量,使某一偏振光无限接近谐振耦合条件产生强耦合,而另一偏振光因远离谐振耦合而耦合程度较弱,实现不同偏振光的分离.该偏振分束器长度短、超宽带、消光比高.在波长1 550 nm处,偏振分束器长度仅为1.14 mm,消光比高达-101.27 dB;消光比小于-20 dB的带宽达到100 nm;消光比小于-10 dB的带宽覆盖了E+S+C+L+U波段,高达350 nm.此全固光子晶体光纤偏振分束器不仅性能优越,结构简单,且全固态的设计结构可有效避免光纤拉制过程中的空气孔坍塌,为设计更优性能的偏振分束器提供了思路.
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Key words
Fiber optics,Three-core photonic crystal fibers,All-solid polarization splitter,All-solid fibers,Tellurite glass
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