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Cielo moves VCSEL arrays into metro nets

Posted: 14 Mar 2002 ?? ?Print Version ?Bookmark and Share

Keywords:cielo? vcsel? surface emitting lasers? optical networks? optoelectronic component?

Cielo Communications this week is moving its vertical-cavity surface-emitting lasers (VCSELs) into the metropolitan network with the announcement of parallel arrays.

The new arrays use 1,310nm VCSELs, which have the reach necessary for metro spans. Most VCSEL arrays, including Cielo's, use 850nm VCSELs and target short-reach applications, particularly backplane replacement.

Cielo is offering eight- and 12-channel arrays for OC-3 (155Mbps), OC-12 (622Mbps) and Gigabit Ethernet. The arrays target distances of up to 15 miles.

Each array takes less space than two small-form-factor single-wavelength modules while providing lasers for eight or 12 wavelengths, said Mick Wilcox, head of product marketing. In addition, Cielo's modules allow all wavelengths to run at high power while staying isolated enough to conform to SONET specifications, Wilcox said.

Cielo does not plan to move from 1,310nm into the next range of wavelengthsthe 1,550nm used for long-haul transmission. "Most of the 1,550 stuff is tunable, and there are already several players there, so I don't know what we would bring to the table," Wilcox said.

The arrays are sampling and are due for volume production in the second quarter.

Craig Matsumoto

EE Times

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