光学衬底上微光纤的传输损耗  

Propagation Loss of Microfibers on Optical Substrates

作　　者：梁定鑫 戴昊 杨宇航[1,2] 张奚宁 蒲继雄[1,2] LIANG Dingxin;DAI Hao;YANG Yuhang;ZHANG Xining;PU Jixiong(College of Information Science and Engineering,Huaqiao University,Xiamen 361021,China;Fujian Key Laboratory of Light Propagation and Transformation,Huaqiao University,Xiamen 361021,China;Center for Ocean Observation Technologies,Xiamen University,Xiamen 366005,China)

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021 [2]华侨大学福建省光传输与变换重点实验室,福建厦门361021 [3]厦门大学海洋与地球学院海洋观测技术研发中心,福建厦门366005

出　　处：《华侨大学学报（自然科学版）》2019年第1期101-105,共5页Journal of Huaqiao University(Natural Science)

基　　金：国家青年科学基金资助项目(61505056);华侨大学高层次人才科研启动项目(12BS220)

摘　　要：选择不同的光学衬底,采用纳米光纤锥直接耦合的方法,测量微光纤传输损耗与光学衬底之间的关系,分析损耗机制,探索降低损耗的有效方法.结果表明:放置于MgF2及CaF2光学衬底上的微光纤传输损耗明显高于悬置于空气中的损耗值;衬底的折射率越接近光纤的折射率,置于其上的微光纤传输损耗越大;在同一种光学衬底上,微光纤直径越大,其传输损耗越小;光学衬底的存在,使微光纤中光场能量中心向衬底方向偏移,增加了传输损耗;采用将微光纤部分悬空的方法可有效降低传输损耗.By depositing on different substrates,the relationship between the propagation loss of microfiber and the substrate is measured through direct coupling of microfiber and tapered nanofiber.The loss mechanics is analyzed and the effective methods to reduce the propagation loss is also proposed.It demonstrates that the losses of microfiber deposited on the MgF 2 and CaF 2 substrates are much higher than the one of the air-suspended microfiber.When the optical index of the substrate closes to the microfiber index,the propagation loss of the microfiber deposited on the substrate increases.On the same substrate,the propagation loss decreases with the increase of the microfiber diameter.The existence of the substrate drags the center of the optical energy field to the substrate and leads to higher loss.By suspending a part of the microfiber in air,the propagation loss can be effectively reduced.

关 键 词：微纳光纤 纳米光纤锥 光学衬底 传输损耗 

分 类 号：TN253[电子电信—物理电子学]