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    • 83. 发明申请
    • Broad-Bandwidth Multimode Optical Fiber Having Reduced Bending Losses
    • 具有减少弯曲损耗的宽带宽多模光纤
    • US20110217012A1
    • 2011-09-08
    • US13037943
    • 2011-03-01
    • Marianne Bigot-AstrucDenis MolinPierre Sillard
    • Marianne Bigot-AstrucDenis MolinPierre Sillard
    • G02B6/036
    • G02B6/03666G02B6/0288G02B6/0365
    • A multimode optical fiber includes a central core, an inner cladding, a buried trench, and an outer cladding (e.g., an outer optical cladding). Typically, the optical fiber's central core is a glass-based central core having an alpha-index profile (i.e., a graded-index profile), an outer radius r1, and a maximum refractive index difference Δn1 with respect to the outer cladding. The central core's alpha-index profile has a minimum refractive index at the central core's outer radius r1 that corresponds to a refractive index difference Δnend with respect to the outer cladding. The inner cladding has an outer radius r2, a width w2, and a refractive index difference Δn2 with respect to the outer cladding. The buried trench has an outer radius rext, a width w3, and a refractive index difference Δn3 with respect to the outer cladding. The multimode optical fiber typically has reduced bending losses, a high bandwidth at wavelengths of both 850 nanometers and 1300 nanometers, and a reduced cladding effect.
    • 多模光纤包括中心芯,内包层,埋入沟槽和外包层(例如,外光学包层)。 通常,光纤的中心芯是具有相对于外包层的α折射率分布(即渐变折射率分布),外半径r1和最大折射率差Dgr; n1的玻璃基中心纤芯 。 中心芯的α折射率分布在中心纤芯的外半径r1处具有最小的折射率,其对应于相对于外包层的折射率差Dgr。nend。 内包层具有相对于外包层的外半径r2,宽度w2和折射率差Dgr; n2。 埋置的沟槽具有相对于外包层的外半径rext,宽度w3和折射率差Dgr; n3。 多模光纤通常具有减小的弯曲损耗,在850纳米和1300纳米的波长处的高带宽以及降低的包层效应。
    • 88. 发明申请
    • METHOD OF COMPUTING AN EFFECTIVE BANDWIDTH OF A MULTIMODE FIBER
    • 计算多模光纤有效带宽的方法
    • US20130100437A1
    • 2013-04-25
    • US13652627
    • 2012-10-16
    • Denis MolinPierre SillardMarianne Bigot-Astruc
    • Denis MolinPierre SillardMarianne Bigot-Astruc
    • G01N21/01
    • G02B6/0288G02B6/262H04B10/073H04B10/079H04B10/2581
    • A method of assessing the power penalty at a given bit error rate of a multimode fiber including measuring a set of elementary fiber responses corresponding to different offset launches of light over the core radius into the multimode fiber, generating a global fiber response by applying, to the set of elementary fiber responses, a set of weighting coefficients and delays depending on the different offset launches of the elementary fiber responses, and computing a parameter representative of a fiber power penalty from the global fiber response, wherein the set of weighting coefficients includes several subsets of weighting coefficients time delayed relative to one another, wherein at least one relative time delay is not set to zero, and wherein weighting coefficients of each subset depend on the different offset launches of the elementary fiber responses.
    • 一种在多模光纤的给定误码率下评估功率损耗的方法,包括测量对应于在芯半径上的光的不同偏移发射的多个基本光纤响应的集合到多模光纤中,通过应用到 基本光纤响应的集合,取决于基本光纤响应的不同偏移启动的一组加权系数和延迟,以及从全局光纤响应计算表示光纤功率代价的参数,其中加权系数集合包括几个 加权系数的子集相对于彼此延迟,其中至少一个相对时间延迟未被设置为零,并且其中每个子集的加权系数取决于基本光纤响应的不同的偏移发射。