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Difference between OM4&OM5 Fiber

Difference between OM4&OM5 Fiber

  • 2021-07-26

As the demand of bandwidth increases, the cost of fiber optic cables to support the next-generation Ethernet speed migration is also getting higher and higher. In this context, OM5 fiber was born to expand the advantages of multimode fiber in the data center. Someone is confused that what is the difference between OM4 and OM5?

 

The key difference between them is that under 4700 MHz-km, the EMB of OM4 fiber is only specified as 850 nm, while the OM5 EMB value is specified as 850 nm and 953 nm, and the value at 850 nm is greater than OM4. Therefore, OM5 fiber provides users with longer distances and more fiber options. In addition, TIA has designated lime green as the regular cable jacket color for OM5, while OM4 is magenta. OM4 is designed for 10Gb/s and 40Gb/s transmission, but OM5 is designed for 40Gb/s and 100Gb/s transmission, which can reduce the number of optical fibers for high-speed transmission.

 

In addition, the OM5 cable can support four SWDM channels, each of which carries 25G data, and uses a pair of multimode optical fibers to provide 100G Ethernet. Also, it is fully compatible with OM4,OM3,OM2 and OM1 fibers. OM5 can be used for installations in a variety of corporate environments around the world, from campuses to buildings to data centers. In short, OM5 fiber is better than OM4 in terms of transmission distance, speed and cost.SZOPT's capacity for such OM4/OM5 optical cable is increasing.

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