The paper illustrates the characteristics of hollow optical fiber in detail and uses the concept of evanescent wave to explain the beam transmission in interface of hollow and core.

对空心光纤的结构特点做了细致的分析，采用迅衰波场的概念来解释空心光纤纤芯与空心处的传光损耗。

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So the paper presents the means of laser engraving of transmission by hollow-core optical fiber.

所以，本文提出用红外传能光纤进行传输激光能量的激光雕刻方法。

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Generally speaking, there are two types of optical fibers for Mid-infrared laser transmission. One is solid-core optical fiber and the other is hollow waveguide.

目前研究传输红外激光光纤一般分为两类：红外实芯光纤和红外空芯波导。

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