铒镱共掺光纤折射率与元素分布均匀性研究  

Research of Refractive Index and Element Distribution Uniformity of Erbium-Ytterbium Co-doped Fiber

作　　者：张哲飞 耿鹏程[1] ZHANG Zhefei;GENG Pengcheng(46^th Research Institute,China Electronics Technology Group Corporation,Tianjin 300220,China)

机构地区：[1]中国电子科技集团公司第四十六研究所,天津300220

出　　处：《天津科技》2020年第10期20-22,25,共4页Tianjin Science & Technology

摘　　要：针对改进的化学汽相沉积工艺结合稀土螯合物高温气相掺杂法制备的双包层铒镱共掺光纤,通过研究铒镱共掺光纤预制棒的芯层沉积层数、每一层芯层反应物流量等因素对铒镱共掺光纤纤芯折射率分布与锗元素浓度分布均匀性的影响,降低了双包层铒镱共掺光纤纤芯中心处折射率凹陷的宽度和深度,同时改善了锗元素浓度分布的均匀性,最终将铒镱共掺光纤在1 535 nm波长处的纤芯吸收系数提高到66.1 dB/m,同时将双包层铒镱共掺光纤在1 200 nm波长处的纤芯本底损耗降低到10.8 dB/km。For the double-clad erbium-ytterbium co-doped optical fiber prepared by the modified chemical vapor deposition process combined with the rare earth chelate high temperature gas-phase doping method,through studying the effect of the number of core layers deposited and the flow rate of reactant in each core layer of the erbium-ytterbium co-doped fiber preform on the distribution of the refractive index and the uniformity of the concentration distribution of germanium in the erbium-ytterbium co-doped fiber core,the width and depth of the refractive index concave at the center of the double-clad erbium-ytterbium co-doped fiber core are reduced.At the same time,the uniformity of the concentration distribution of germanium element is improved.Finally,the core absorption coefficient of the erbium-ytterbium co-doped fiber is increased to 66.1 dB/m at the wavelength of 1535 nm,and the background loss of the double-clad erbium-ytterbium co-doped fiber is reduced to 10.8 dB/km at the wavelength of 1200 nm.

关 键 词：铒镱共掺 折射率 分布均匀性 吸收系数 

分 类 号：TN253[电子电信—物理电子学]