点缺陷-不纯净的晶缺陷，例如格子空缺或原子空隙。

Point defect - a crystal defect that is an impurity, such as a lattice vacancy or an interstitial atom.

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基于超格子构造法，采用全矢量模型研究具有中心缺陷孔的椭圆孔光子晶体光纤(EHPCF)的偏振特性。

Based on the supercell overlapping method the full vector model was adopted to model polarization properties of elliptical-hole photonic crystal fiber (EHPCF) with central defect hole.

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