50 / 125 Multi-Mode (OM4)


The explosion in demand for bandwidth in enterprise networks is driving an urgent need for higher Ethernet network speeds. Several factors are contributing to this, including broadband penetration fueled by video-rich content, Data Center demands, and exponential growth in supercomputer and R&D computing activities. Laser-optimized multimode fiber is recognized as the medium of choice to support these high-speed data networks.

With next-generation 40 and 100 Gigabit Ethernet speeds on the horizon, the industry is developing a new type of multimode fiber, called OM4, which will offer a minimum effective modal bandwidth of 4700 MHz-km at 850 nm, compared with 2000 MHz-km for OM3.

What is “OM4” fiber?

OM4 fiber is a 50 μm laser-optimized fiber with extended bandwidth. It will be used to enhance the system cost benefits enabled by 850 nm VCSELs for existing 1 and 10 Gb/s applications as well as future 40 and 100 Gb/s systems.

OM4 fiber will support Ethernet, Fibre Channel, and OIF applications, allowing extended reach upwards of 550 meters at 10 Gb/s for ultra long building backbones and medium length campus backbones. With an Effective Modal Bandwidt (EMB, also known as laser bandwidth) of 4700 MHz-km (more than double the IEEE requirement for 10 Gb/s 300 meter support), OM4 fiber is also especially well suited for shorter reach data center and high performance computing applications.