But because of the higher modules loss caused by the coupling condition , the total transmission rate of the system can only reaches 65 % 但由于耦合时在空芯光纤中造成一定的高阶模式损耗，整个激光传输系统的传输效率不是很高，仅65左右。
Therefore , the cop / ag leaky type of hollow waveguide fabricated in this work will be a good candidate for coa laser delivery in medical surgery as well as material processing 这表明所制备的cop ag空芯光纤能很好地用来传输co _ 2医疗激光。
Finally a new theory about energy delivering in hollow waveguide is given . in this theory the input attenuation in both straight and bent hollow waveguide 在这一理论体系中，我们得到了空芯光纤的输入特性和光纤直线状态下与弯曲状态下的损耗公式。
Accordingly , as far as the bent loss is concerned the ag fiber is highly above the cop / ag fiber , especially when the carve angle is increased Cop ag空芯光纤的弯曲损耗比ag空芯光纤的弯曲损耗大大降低，尤其是随着弯曲角度的增加，降低的程度更明显。
The study on all - reflective - film hollow - core waveguides is very important for the application of co2 laser in many fields such as medical treatment , laser processing and so on 全反射膜空芯光纤的开发对开拓co _ 2激光在激光医疗、激光加工等领域的应用具有重要意义。
All of the researches are shown that , the lcof has good capabilities of temperature , bearing and microbend , and it is can be belt in composite materials 研究结果表明，本文研制的液芯光纤有着良好的承载、温度、微弯传感性能，与航空用的复合材料具有良好的兼容性。
( 4 ) investigation of the capabilities of sensitivity of temperature and microbend . ( 5 ) research on the compatibility of the lcof between composite materials ( 6 )液芯光纤与复合材料的兼容性研究：采用较成熟的全息干涉计量术，研究埋入液芯光纤与复合材料的兼容性。
Secondly we get the electromagnetic distributions in hollow waveguide by doing some operations on maxwell formula . we also get the characteristic formula in hollow waveguide 其次，我们通过对maxwell方程的推导，提出了空芯光纤中各向电磁场分量的解，在此基础上我们得到了空芯光纤的特征方程。
The emphasis of this paper is the delivery of co2 laser radiation , including hollow waveguides and coupling devices for input ends , and both of them are based on special theoretic design 本论文研究的重点是co _ 2激光的传输，包括传输用空芯光纤和输入端耦合器件两个方面。而两方面的研究都是建立在一定的理论设计基础上的。
( 2 ) research on the solidification of liquid core to seek after the rule of the changing light intensity . ( 3 ) study on the damage and repair of the lcof ( 3 )液芯光纤损伤与修复的实验研究：对损伤的液芯光纤进行承载实验研究；将损伤后的液芯光纤进行光固化修复，对修复全程进行监控，对修复后的液芯光纤进行了承载实验研究。
