LaserComm Optical Tests Could Cut Bandwidth Costs

SAN MATEO (03/07/2000) - LaserComm Inc. has completed testing of broadband technology that could lead to reduce bandwidth through use of optical network links.

LaserComm together with AT&T Labs announced today that the two companies had completed key DWDM (Dense Wave-Division Multiplexing) tests. Specifically, LaserComm, using AT&T's testing facilities, achieved a broadband transmission rate of 40Gbps while correcting crucial dispersion problems that have plagued optical networking. The companies made the announcement at Optical Fiber Conference 2000 going on this week in Baltimore.

DWDM systems above 2.5Gbps often suffer chromatic dispersion and dispersion slope problems when light fans out as it passes through the medium. LaserComm claims that its Hi-Mode Dispersion Management Device (DMD) breaks those dispersion slope barriers.

LaserComm now will focus on commercialization of DMD, which eventually could drive bandwidth costs down by 40 percent.

"LaserComm has managed to resolve dispersion on a broad spectrum to correct fiber completely. Once that was done, the question immediately was 'Will it now support 40Gbps?'" said Mark Barratt, LaserComm's vice president of business development.

Networking giants including Alcatel and Lucent and newcomers such as Qtera and Sycamore have been waiting on such capability, Barratt said. AT&T was in on the tests largely because of the carrier's extensive fiber holdings, Barratt added.

AT&T Corp., in Basking Ridge, N.J. is at LaserComm Inc., in Plano, Texas, is at

Jennifer Jones is an InfoWorld senior editor.

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