GSO IEC TR 62614-2:2021由GSO 发布于 2021-07-01。
GSO IEC TR 62614-2:2021在国际标准分类中归属于: 33.180.01 光纤系统综合。
GSO IEC TR 62614-2:2021 光纤 多模发射条件 第2部分:确定测量多模衰减的发射条件要求的最新版本是哪一版?
最新版本是 GSO IEC TR 62614-2:2021 。
IEC TR 62614-2:2015(E) which is a Technical Report, is intended to show the background of encircled flux for the characterization of multimode launch conditions. This includes the selection of the encircled flux and the definition of the encircled flux requirements in conjunction with the implied variation for all multimode attenuation and return loss measurement methods on graded index multimode fibre products. This first edition cancels and replaces IEC TR 61282-11 published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - significant reduction to the clause on uncertainties; - technical edits throughout in addition to updates to key normative references; - incorporation of additional figures related to the wavelength bias between 850 nm and 1 300 nm as well as the encircled flux limit of 10 Gigabit Ethernet VCSELs. This publication contains an attached file titled, "TR 62614-2 Supplemental Data", in the form of an Excel spreadsheet. This file is intended to be used as a complement and does not form an integral part of this Technical Report. Keywords: encircled flux, multimode launch conditions
展示过满条件的图使用FT200EMT多模光纤进行的光束轮廓测量多模光纤未充满或过满条件各有优劣,这取决于特定应用的要求。如需测量多模光纤的基准性能,Thorlabs建议使用光束直径为光纤芯径70-80%的入纤条件。过满条件在短距离时输出功率更大;而长距离(>10 - 20 m)时,对衰减较为敏感的高阶模会消失。...
适用于5.5公里(3.5英里)或更短距离的传输,这样一个系统能够提供的定性视频性能是相当不错的,并且总是能够达到RS-250C长距离传输的品质要求。但是,AM视频传输设备仅适合850nm。多模工作波长这就限制了最大可用传输距离。更显著的是,对于每1dB的光学路径损耗而言,基于调幅系统的信噪比的线性相关衰减为2dB,因此,可接受的视频传输质量仅能在相对较短的光缆距离下获得。...
尽管此定义对于阶跃折射率多模光纤很有用,但对于单模光纤,它并不是预测光纤出射光的远场行为的非常准确的方法。一种更准确的技术是对光纤中的光使用模式场直径(MFD),以确定远场。我们可以将光纤的输出实质上视为高斯行为。如果然后将光纤的有效数值孔径(NAeff)定义为从中心到强度下降到原始值的1 / e2的角度的正弦值,则可以表明NAeff = 2O / SMFD。...
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