Title :
Using RZ DPSK-Based Transponders for Upgrades on Existing Long-Haul Submarine WDM Systems
Author :
Golovchenko, Ekaterina A. ; Rahman, Lutfur ; Bakhshi, Bamdad ; Kovsh, Dmitiriy ; Idrovo, Fernando ; Abbott, Stuart M.
Author_Institution :
Tyco Telecommun., Eatontown
Abstract :
The RZ-DPSK transmission format allows higher capacity and greater flexibility in system configurations when upgrading existing WDM systems. We report on using RZ-DPSK for upgrades of systems originally designed for RZ-OOK transponders. In this paper, we discuss the use of RZ-DPSK transponders on an installed trans-Pacific link and on the Sam-1 Cable System where the original transmission lengths were significantly increased. On the original Sam-1 Cable System, each digital line segment was less than 5000 km long. At the owners request these shorter sections were concatenated to make a 10,757-km commercial WDM 10 Gb/s fiber optic link, the longest in the world. Ten Gb/s transponders were successfully deployed onto the concatenated segments, and DPSK transponders will allow 480 Gb/s capacity.
Keywords :
differential phase shift keying; optical communication; transponders; wavelength division multiplexing; RZ differential phase-shift keying; Sam-1 Cable System; long-haul transmission systems; nonlinear crosstalk; optical communication; polarization mode dispersion; trans-Pacific link; transponders; wavelength-division multiplexing; Differential quadrature phase shift keying; Fiber nonlinear optics; Nonlinear optics; Optical crosstalk; Optical design; Optical fiber cables; Optical modulation; Transponders; Underwater vehicles; Wavelength division multiplexing; Long-haul transmission systems; nonlinear crosstalk; optical communication; polarization mode dispersion; wavelength-division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.913030
