A 1 - Leoni

OfficeIndustryDataCenter185Graph 1 shows the system reserves afforded by the high-qualityfibers and connectors in relation to EN 50173.Decisive advantages of these system reserves are:■■■■■■■■Longer transmission lengths for certain applications(100 Mb/s, 1 GbE, 10 GbE, 40 GbE, 100 GbE)The option to insert more patch cords or splicesAdditional attenuation caused by aging processescan be curtailedNetwork extensions can be realised with ease and a certainlevel of assurance within the link lengthsDistance/kmAttenuation-limitedoperationLEONI OM4LEONI OM3LEONI OM2eStandard OM3Standard OM2Dispersion-limitedoperationQuality is our benchmarkAssembly of fiber optic connectors involves both adjustment ofthe fibers in the ferrule as well as time-consuming grinding andpolishing. The aim here is to machine the connector so preciselyby means of optimised processes that the insertion loss andreflections are kept to a minimum. This is done by means ofPC polishing (PC = physical contact). Spherical polishing of theferrule spring mounted in the connector housing producesa fiber/fiber transition at the end faces. In other words whentwo connectors are plugged into one coupling, the springpressure pushes out all the air between the mating fibers ofboth connectors. The glass/glass transition then has very lowreflections and low attenuation.To maximise the performance of a PC connector, the surfaceparameters of the connectors must be carefully checked duringthe polishing process. The interferometer is an indicatorymeasuring instrument for this. The overlaps of coherent lightwaves are used to measure the quality of optical surfaces(ferrule surfaces).GigaLine ® FO connectivityBandwidth/MHzGraph 1: System reserves of GigaLine® 150, 300 and 550 relative to the standardThe most important parameters are:■■■■■■Apex offset (offset between the highest point and the centreof the fiber)Radius of the connector interface (fiber/ferrule)Fiber height (undercut, protrusion)These parameters are decisive for the long-term behaviour andtherefore the quality of a fiber optic connector.Insertion lossof the connectors used in GigaLine® system components.Insertion lossFiber typetyp.ReturnlossG62.5/125 OM1e 0.2 dB > 40 dBG50/125 OM2e 0.2 dB > 40 dBG50/125 OM3 0.2 dB > 40 dBG50/125 OM4 0.2 dB > 40 dBE9..10/125 OS2 0.2 dB > 50 dBE9..10/125 OS2 APC 0.2 dB > 70 dBwww.leoni-infrastructure-datacom.com