At their meeting in Barcelona on 18th to 22nd February 2008, the ISO/IEC JTC1 SC25 WG3 standards committee proposed the establishment of a new optical fibre types or Category. Termed OM4, it will provide more than twice the laser/VCSEL bandwidth of OM3 and is targeted to provide greater useable distance and/or lower system implementation costs for the next generation 40 Gb/s and 100 Gb/s Ethernet solutions that are currently in development.
I'd like to thank Mike Gilmore, Technical Director of the Fibreoptic Industry Association, for this news. It looks like OM4 will become a reality but my guess is that it will be at least a year before it's ratified. This, however, won't stop draft OM4 being manufacured.
Alan Bullen
Lynx Networks plc
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