Tiny optical amps take on busy metro traffic.(Genoe corp. optical amplifier chips)(Brief Article) From: Machine Design | Date: May 3, 2001| Author: Kren, Lawrence | COPYRIGHT 2001 Penton Media, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Fiber-optic networks transmit multiple signals -- separated by wavelength -- on single fibers in a process called dense wavelength division multiplexing (DWDM). Transmission is highly efficient but not lossless so erbium-doped fiber amplifiers (EDFAs) boost signals about every 50 to 80 km. One EDFA is required for each fiber needing amplification.

EDFAs are complex, hybrid optoelectronic modules about the size of a videocassette and cost up to $30,000. And although they ...

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