Title :
Can 40-gb/s duobinary signals be carried over transparent DWDM systems with 50-GHz channel spacing?
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
The feasibility of transmitting 40-Gb/s optical duobinary signals over transparent dense wavelength-division-multiplexed (DWDM) systems with a 50-GHz channel spacing and multiple optical add-drop multiplexers (OADMs) is investigated. While the duobinary format is tolerant to passband narrowing, from concatenated filtering by the OADMs, it is very sensitive to the group-delay ripple (GDR) associated with this filtering. We show that GDR must be carefully controlled, e.g., by GDR compensation, before 40-Gb/s duobinary signals can be effectively used in DWDM systems originally designed for 10-Gb/s traffic.
Keywords :
channel spacing; compensation; optical design techniques; optical fibre communication; optical filters; transparency; wavelength division multiplexing; 40 Gbit/s; 50 GHz; channel spacing; concatenated filtering; group-delay ripple; multiple optical add-drop multiplexers; optical duobinary signals; passband narrowing; transparent DWDM systems; transparent dense wavelength-division-multiplexed systems; Channel spacing; Concatenated codes; Control systems; Filtering; Optical add-drop multiplexers; Optical filters; Optical sensors; Passband; Signal design; Wavelength division multiplexing; 40-Gb/s transmission; dense wavelength-division multiplexing (DWDM); optical add–drop multiplexing (OADM); optical duobinary;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.846456
