发明授权
- 专利标题: Isotopically altered optical fiber
- 专利标题(中): 同位素改变的光纤
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申请号: US10322148申请日: 2002-12-18
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公开(公告)号: US06810197B2公开(公告)日: 2004-10-26
- 发明人: Douglas C. Allan , John T. Brown , Lisa C. Chacon , Adam J. G. Ellison , James C. Fajardo , Stuart Gray , Keith L. House , Karl W. Koch, III , Dale R. Powers , James A. West
- 申请人: Douglas C. Allan , John T. Brown , Lisa C. Chacon , Adam J. G. Ellison , James C. Fajardo , Stuart Gray , Keith L. House , Karl W. Koch, III , Dale R. Powers , James A. West
- 主分类号: G02B600
- IPC分类号: G02B600
摘要:
An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen-18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.
公开/授权文献
- US20030128955A1 Isotopically altered optical fiber 公开/授权日:2003-07-10