Definition of four different International Organisationi for Standardization (ISO) multimode fibers categories.
This is due to increase in demand for multimode bandwidth applications especially in Gigabit Ethernet applications.
ISO 651.1 ISO/IEC 11801:2002 (OM1)
Graded Inded MM - 850/1300nm - data communication
ISO 651.1 ISO/IEC 11801:2002 (OM2)
Graded Index MM - 850nm/1300nm - Video and data communcation
ISO 651.1 ISO/IEC 11801:2002 (OM3)
Graded Index MM50/125micron - Laser 850nm - Gigebit Ethernet application
ISO 651.1 ISO/IEC 11801:2002 (OM4)
Graded Index MM - VCSEL - 850nm - 40 GB/s , 10Gb/s data center application
I have been in the field of fiber optics since early 1990s. I gained fiber optics skills and knowledge via my working experience as end-user, main contractor and sub-contractor and finally as an optical fiber enterpreneur.