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what is OM4

Author : Date : 12/25/2012 11:39:13 PM
 What is OM4?

OM4 fiber is a laser-optimized core 50μm multimode fiber, the indicators of the criteria to determine is an upgraded version of an OM3 multimode fiber actually. There have many Corning OM3 fibers on the market now, and the actual indicators have reached the standard of OM4 fiber.

Compared to OM3 fiber, the OM4 just upgrade in the optical fiber bandwidth indicators. OM4 standard OM3 fiber compared to the 850nm wavelength effective modal bandwidth (EMB) and overfilled bandwidth (OFL) is improved. The table below for the specific requirements of the indicators:

The OM3 fiber OM4 fiber
850nm laser performance bandwidth
EMB (MHz.km) 2000 4700
850nm LED light source bandwidth
OFL (MHz.km) 1500 3500
1300nm LED light source bandwidth
OFL (MHz.km) 500 500