Title :
From lab demo to field trial: Real-time coherent 127 Gb/s PM-QPSK transmission
Author :
Zhang, Bo ; Khatana, Sunil
Author_Institution :
Opnext Subsystems, Opnext, Inc., Los Gatos, CA, USA
Abstract :
We review the generation, detection and long-haul transmission of single-wavelength coherent PM-QPSK systems. The technology attributes of the 100G coherent transponder is first described from a system´s perspective. Lab results then follow from various fiber-channel degrading effects, including cascading of more than ten 50GHz ROADMs over 1500km transmission test-bed. We conclude with a recent field trial of upgrading an installed 10-Gb/s field system to 100-Gb/s using an FPGA-based real-time, single-carrier, coherent transponder prototype. Transmission over installed 1800km link was achieved with sufficient performance for error-free operation after FEC.
Keywords :
channel spacing; forward error correction; multiplexing equipment; optical fibre communication; optical modulation; quadrature phase shift keying; transponders; FEC; FPGA; PM-QPSK; bit rate 10 Gbit/s to 100 Gbit/s; bit rate 127 Gbit/s; coherent transponder; distance 1500 km; distance 1800 km; fiber-channel degrading effects; reconfigurable optical add/drop multiplexer; Bit error rate; Digital signal processing; Field programmable gate arrays; Optical add-drop multiplexers; Optical fiber networks; Optical noise; Signal to noise ratio;
Conference_Titel :
Photonics Global Conference (PGC), 2010
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-9882-6
DOI :
10.1109/PGC.2010.5706065
