The optical fiber with pure quartz core and Fluorine-doped glass cladding was made by POD (plasma outside deposition) technique in some corporations, while we used the creative technique of “overcladding F-doped tube...The optical fiber with pure quartz core and Fluorine-doped glass cladding was made by POD (plasma outside deposition) technique in some corporations, while we used the creative technique of “overcladding F-doped tube onto quartz rod in high temperature” to make the optical fiber which has the same structure as that from POD, in order to research and compare the influence factors on the loss of the fiber, our research work includes contrast experiments on coating polymers with different refractive index and the concentricity error of the fiber core and cladding. The measurement results show us that there are great differences in the loss spectra between the different fiber samples. We made analysis of it.展开更多
An optimal refractive index profile of pure silica core optical fiber (PSCF) was de- signed, in combination with the characters of the modified chemical vapor deposi- tion (MCVD) process. Techniques of preform fabrica...An optimal refractive index profile of pure silica core optical fiber (PSCF) was de- signed, in combination with the characters of the modified chemical vapor deposi- tion (MCVD) process. Techniques of preform fabrication by a new furnace round heating MCVD process and fiber drawing process were reviewed. Difficulties in doping fluorine in silica, widening the depressed-index cladding and maintaining the index of fiber core were discussed. Methods used to overcome these difficulties were given at the same time. Additionally, the optimal refractive index profiles of PSCF were presented.展开更多
研究了光纤的辐照损伤机理,对纯硅芯光纤与传统芯层掺杂光纤的结构特点进行了系统地分析,从结构组成特点上分析了两者的抗辐照性能差异。研究了国内外关于光纤的抗辐照试验标准,对各标准中剂量率、总剂量等试验条件差异进行了对比,并对...研究了光纤的辐照损伤机理,对纯硅芯光纤与传统芯层掺杂光纤的结构特点进行了系统地分析,从结构组成特点上分析了两者的抗辐照性能差异。研究了国内外关于光纤的抗辐照试验标准,对各标准中剂量率、总剂量等试验条件差异进行了对比,并对不同剂量率对光纤辐照试验结果的影响进行了分析,给出了光纤在空间辐照环境条件下应用的γ辐照试验条件的选择原则。最后,采用0.1 rad(Si)/s剂量率对某国产纯硅芯光纤的抗辐照性能进行了试验评估,光纤在20 k rad(Si)总剂量辐照后光纤损耗为1.934 d B/km。空间辐照性能评估结果满足该项目的宇航型号的空间环境使用需求,辐照评估结论为可用。展开更多
文摘The optical fiber with pure quartz core and Fluorine-doped glass cladding was made by POD (plasma outside deposition) technique in some corporations, while we used the creative technique of “overcladding F-doped tube onto quartz rod in high temperature” to make the optical fiber which has the same structure as that from POD, in order to research and compare the influence factors on the loss of the fiber, our research work includes contrast experiments on coating polymers with different refractive index and the concentricity error of the fiber core and cladding. The measurement results show us that there are great differences in the loss spectra between the different fiber samples. We made analysis of it.
基金the Hi-Tech Research and Development Program of China (Grant No. 2002AA312190)National Natural Science Foundation of China (Grant No. 60477017)+2 种基金Program for the New Century Excellent Talents in University (Grant No. NCET-06-0076)Beijing Natural Science Foun-dation (Grant No. 4052023)the Beijing Jiaotong University Foundation (Grant No. 2006XM003)
文摘An optimal refractive index profile of pure silica core optical fiber (PSCF) was de- signed, in combination with the characters of the modified chemical vapor deposi- tion (MCVD) process. Techniques of preform fabrication by a new furnace round heating MCVD process and fiber drawing process were reviewed. Difficulties in doping fluorine in silica, widening the depressed-index cladding and maintaining the index of fiber core were discussed. Methods used to overcome these difficulties were given at the same time. Additionally, the optimal refractive index profiles of PSCF were presented.
文摘研究了光纤的辐照损伤机理,对纯硅芯光纤与传统芯层掺杂光纤的结构特点进行了系统地分析,从结构组成特点上分析了两者的抗辐照性能差异。研究了国内外关于光纤的抗辐照试验标准,对各标准中剂量率、总剂量等试验条件差异进行了对比,并对不同剂量率对光纤辐照试验结果的影响进行了分析,给出了光纤在空间辐照环境条件下应用的γ辐照试验条件的选择原则。最后,采用0.1 rad(Si)/s剂量率对某国产纯硅芯光纤的抗辐照性能进行了试验评估,光纤在20 k rad(Si)总剂量辐照后光纤损耗为1.934 d B/km。空间辐照性能评估结果满足该项目的宇航型号的空间环境使用需求,辐照评估结论为可用。
