what is om3 fiber
First, OM stands for optical multi-mode. Both OM3 an OM4 are 50/125 core fiber but they have different internal construction that allows the OM4 fiber to provide the same performance as OM3 but for longer distances.The reason for this is the difference in bandwidth, OM3 has 2500 megahertz bandwidth, OM4 has 4700 megahertz bandwidth.hat this translates to is longer transmission distances for the OM4 fiber. So you will need to know the distance of the fiber run in order to help decide which kind of fiber and fiber accessories need to be used.
In addition, multi-mode fibers are described using a system of classification determined by the ISO 11801 standard â OM1, OM2, and OM3 â which is based on the modal bandwidth of the multi-mode fiber.OM4 (defined in TIA-492-AAAD) was finalized in August 2009, and was published by the end of 2009 by the TIA.he main difference between multi-mode and single-mode optical fiber is that the former has much larger core diameter, typically 50â100 micrometers; much larger than the wavelength of the light carried in it.