OM4 fiber is a 50 µm laser-optimized fiber with extended bandwidth. It will be used to enhance the system performance for existing 1 and 10 Gbit/s applications as well as future 40 and 100 Gbit/s systems. OM4 fiber will support Ethernet, Fiber Channel, and OIF applications, allowing extended reach upwards of 550 meters at 10 Gbit/s for ultra-long building backbones and medium length campus backbones. With a laser bandwidth of 4700 MHz-km (more than double the IEEE requirement for 10 Gbit/s 300-meter support), the OM4 fiber is also especially well-suited for shorter reach in data centers and high-performance computing applications. In use at low data rates such as 100 Mbit/s or 1 Gbit/s, OM4 is on par with the OM2 or OM3 fibers. The OM4 fiber shows their true strengths at data rates of 10 Gbit/s and 40 Gbit/s with ranges of 550 meters or 300 meters.