
8
ROADMs and their system
applications
Mark D. Feuer
*
, Daniel C. Kilper
†
, and
Sheryl L. Woodward
*
*
Optical Systems Research, AT&T Labs, Middletown, NJ, USA
†
Bell Laboratories, Alcatel-Lucent, Holmdel, NJ, USA
In less than a decade, the state of the art in fiber-optic transport systems has
evolved from simple point-to-point chains of optically amplified fiber spans to
massive networks with hundreds of optical ly amplified spans connecting trans-
parent add/drop nodes spread over transcontinental distances. The primary driver
for this transformation has been a remarkable improvement in cost, while its
primary enabler has been the emergence of the reconfigura ...