METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS
    46.
    发明申请
    METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS 审中-公开
    用选择性扩散层形成光纤预制件的方法

    公开(公告)号:US20140174133A1

    公开(公告)日:2014-06-26

    申请号:US14107259

    申请日:2013-12-16

    Abstract: Methods for forming optical fiber preforms are disclosed. According to one embodiment, a method for forming an optical fiber preform includes forming a preform core portion from silica-based glass soot. The silica-based glass soot may include at least one dopant species for altering an index of refraction of the preform core portion. A selective diffusion layer of silica-based glass soot may be formed around the preform core portion to form a soot preform. The selective diffusion layer may have an as-formed density greater than the density of the preform core portion. A diffusing species may be diffused through the selective diffusion layer into the preform core portion. The soot preform may be sintered such that the selective diffusion layer has a barrier density which is greater than the as-formed density and the selective diffusion layer prevents diffusion of the at least one dopant species through the selective diffusion layer.

    Abstract translation: 公开了形成光纤预制棒的方法。 根据一个实施例,用于形成光纤预制棒的方法包括从二氧化硅基玻璃烟炱形成预制芯部分。 二氧化硅基玻璃烟炱可以包括至少一种用于改变预制核心部分的折射率的掺杂物种类。 二氧化硅基玻璃烟炱的选择性扩散层可以在预制核心部分周围形成,以形成烟炱预制件。 选择性扩散层可以具有大于预制核心部分的密度的形成密度。 扩散物质可以通过选择性扩散层扩散到预制核心部分中。 烟炱预制件可以烧结,使得选择性扩散层具有大于形成密度的势垒密度,并且选择性扩散层防止至少一种掺杂剂物质通过选择性扩散层的扩散。

    Optical fiber
    47.
    发明授权
    Optical fiber 有权
    光纤

    公开(公告)号:US08724951B2

    公开(公告)日:2014-05-13

    申请号:US13574080

    申请日:2011-01-24

    Abstract: According to one example of the invention an optical fiber comprises: (i) a core comprising Al doped silica but essentially no Er or Yb, and having a first index of refraction n1; (ii) at least one F doped silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2, wherein the cladding comprises essentially of SiO2 and 0.2-5 wt % F; (iii) a hermetic carbon based coating surrounding said cladding, said hermetic coating being 200 to 1000 Angstroms thick; and (iv) a second coating surrounding said hermetic coating, said second coating being 5 μm to 80 μm thick.

    Abstract translation: 根据本发明的一个示例,光纤包括:(i)包含Al掺杂二氧化硅但基本上不含Er或Yb并且具有第一折射率n1的芯; (ii)至少一个F掺杂的二氧化硅基包层,其围绕所述芯并且具有第二折射率n2,使得n1> n2,其中所述包层基本上由SiO 2和0.2-5重量%F组成; (iii)围绕所述包层的密封碳基涂层,所述密封涂层为200至1000埃厚; 和(iv)围绕所述密封涂层的第二涂层,所述第二涂层为5μm至80μm厚。

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