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采用聚碳酸酯管材拉丝制作了空芯光纤的基管,基管内面的光滑特性有效降低了损耗。采用聚碳酸酯基管制作的大口径空芯光纤便于与光源的高效耦合。光纤柔韧性好即使被折断也不会产生玻璃碎片,具有很高的安全系数。搭建开发了完整的拉丝和控制系统,优化了系统部件和制作参数,成功拉制尺寸可控的大口径超柔韧空芯光纤基管。试制了均匀型空芯光纤和渐变型空芯光纤。初步实验证明均匀型空芯光纤在直线与弯曲时对传输光线的发散角并无影响;而渐变型光纤对输出光斑具有整形作用,即大端入射光束发散,小端入射光束汇聚。
Using polycarbonate tube drawing hollow core fiber made of the base tube, smooth inner surface of the base tube effectively reduce the loss. Large diameter hollow fiber made of polycarbonate base tube facilitates efficient coupling with the light source. Good optical fiber flexibility will not produce broken glass fragments, with a high safety factor. Built and developed a complete drawing and control system, optimizing the system components and manufacturing parameters, the successful drawing of large-diameter super-flexible hollow core optical fiber tube. Trial production of uniform hollow fiber and tapered hollow fiber. The preliminary experiment shows that the uniform hollow-core fiber has no influence on the divergence angle of the transmitted light in the straight line and the bend. The tapered fiber has the shaping effect on the output light spot, ie, divergence of the large-end incident beam and convergence of the small-end incident beam.