Underwriters Laboratories Inc. (UL) has verified that Corning ClearCurve OM3 and OM4 optical fibers from Corning Inc. (NYSE:GLW) meet or exceed standards for bandwidth measurements, including: TIA-455-220-A Differential Mode Delay Measurement of Multimode Fiber in the Time Domain and IEC 60793-1-49 Optical Fibers Part 1-49; Measurement Methods and Test Procedures.
UL conducted tests on-site at Corning’s Center for Fiber Optic Testing (CFT) using Corning’s Differential Mode Delay (DMD) and associated Minimum Calculated Effective Modal Bandwidth (minEMBc) measurements.
“Corning was the original architect of the DMD and the minEMBc measurement methods. We use minEMBc to conduct bandwidth testing on all of our 50µm multimode fibers because we believe it is the most precise, accurate, and robust bandwidth measurement technique for multimode fiber,” explains Jeff Englebert, manager of CFT and product engineering.
An advantage of the minEMBc method, it takes into account a wide variety of fiber-transceiver combinations, providing a more accurate evaluation of system bandwidth which is a function of both fiber and transceiver performance. Corning’s minEMBc measurement benches use precise Ti-Sapphire laser-source technology that results in a highly accurate, repeatable high-resolution DMD (HRDMD) measurement.
ClearCurve OM3 and OM4 fibers are compliant to existing standards for 50 µm multimode fiber. They are backwards compatible to the installed base and offer up to 10 times better bend performance when compared with standard multimode fibers. They allow more margin for better system performance and enable smaller cable, hardware, and equipment designs. ClearCurve multimode fiber is Corning’s standard 50 µm product offering.