OM4+: A case of the emperor's new clothes?

Over the last year, you may have heard proponents espouse the benefits of OM4+ multimode fibre. For instance, they claim it is better for single-wavelength applications, and it’s comparable to OM5 for multiwavelength application support. While OM4+ may have some useful attributes, which vary from company to company, that variation is a clue to the fact that in all cases it is proprietary, meaning it is not standardised. Essentially, the public is being asked to take OM4+ proponents at their word. As New York Yankees legend Yogi Berra once said, ‘It’s like déjà vu all over again’.


Cable companies consider coherent optics

Modern hybrid fibre coaxial (HFC) cable access networks are very different to their original home television delivery-focussed incarnation, observes Alberto Campos, distinguished technologist at CableLabs, in Louisville, Colorado. ‘Broadcast TV demand has been decreasing,’ he told Fibre Systems. ‘Online or on-demand viewing and broadband internet have been increasing and are the biggest residential items.’ Our appetite for data seems insatiable, with internet connection speeds accelerating at approximately 45 per cent annually, he says.


CommScope launches LazrSPEED 550 WideBand multimode fibre

To meet the challenges associated with escalating data rates and the ongoing need for higher bandwidth in the data centre, CommScope has introduced SYSTIMAX cabling and connectivity products based on its LazrSPEED 550 WideBand multimode fibre (WBMMF).

CommScope demonstrated the capabilities of the new fibre alongside Finisar’s new short-wavelength division multiplexing (SWDM) transceivers at OFC 2015. The emerging WBMMF standard enables up to four times more bandwidth at longer distances than standard multimode fibre.


To continue growing data traffic, optical scientists are tackling tough questions about nonlinear effects in optical fibre, discovers Andy Extance