Separately, E2O has been preparing a 1310nm VCSEL for some time (see VCSELs Revisit OFC). That device is nearing availability, meaning a 1310nm, 4-Gbit/s transceiver could be announced by the second quarter of 2004, says Wenbin Jiang, E2O vice president of advanced technology. Infineon, meanwhile, demonstrated its 1310nm transceiver at ECOC this week.
The 4-Gbit/s rush was fueled by the Fibre Channel Industry Association's surprise vote to standardize 4-Gbit/s storage area networks (SANs). Most SAN vendors had counted on jumping to 10 Gbit/s directly, to tap the growing pool of 10-Gbit/s Ethernet electronics and optics.
It's still possible that 4 Gbit/s will be a short-lived stopgap for companies waiting to get to 10 Gbit/s. "The move to 4 Gbit/s is only because there is some doubt that 10 Gbit/s will come soon," writes analyst Tom Hausken, of Strategies Unlimited
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