Multimode fibers are identified by the OM (“optical mode”) designation as outlined in the ISO/IEC 11801 standard. OM1, for fiber with 200/500MHz*km overfilled launch (OFL) bandwidth at 850/1300nm (typically 62.5/125um fiber) OM2, Type A1a.1 , for fiber with 500/500MHz*km OFL bandwidth at 850/1300nm (typically 50/125um fiber) OM3, Type A1a.2, for laser-optimized 50um fiber having 2GHz*km […]
What is OM4 ? Based on The New TIA/EIA Standard, OM4 is a laser-optimized, high bandwidth 50µm multimode fiber. In August of 2009, TIA/EIA approved and released 492AAAD, which defines the performance criteria for this grade of optical fiber. While they developed the original “OM” designations, IEC has not yet released an approved equivalent standard […]
In terms of physical properties, the difference between these two fiber types is the diameter of the core—the light-carrying region of the fiber. In 62.5/125 fiber, the core has a diameter of 62.5 microns and the cladding diameter is 125 microns. For 50/125, the core has a diameter of 50 microns with the same cladding […]
