Title :
Spatial Superchannel Routing in a Two-Span ROADM System for Space Division Multiplexing
Author :
Nelson, L.E. ; Feuer, Mark D. ; Abedin, Kazi ; Zhou, Xiaoxin ; Taunay, Thierry F. ; Fini, John M. ; Zhu, Benpeng ; Isaac, R. ; Harel, R. ; Cohen, G. ; Marom, Dan M.
Author_Institution :
AT&T Labs., Middletown, NJ, USA
Abstract :
We report a two-span, 67-km space-division-multiplexed (SDM) wavelength-division-multiplexed (WDM) system incorporating the first reconfigurable optical add-drop multiplexer (ROADM) supporting spatial superchannels and the first cladding-pumped multicore erbium-doped fiber amplifier directly spliced to multicore transmission fiber. The ROADM subsystem utilizes two conventional 1 × 20 wavelength selective switches (WSS) each configured to implement a 7 × (1 × 2) WSS. ROADM performance tests indicate that the subchannel insertion losses, attenuation accuracies, and passband widths are well matched to each other and show no significant penalty, compared to the conventional operating mode for the WSS. For 6 × 40 × 128-Gb/s SDM-WDM polarization-multiplexed quadrature phase-shift-keyed (PM-QPSK) transmission on 50 GHz spacing, optical signal-to-noise ratio penalties are less than 1.6 dB in Add, Drop, and Express paths. In addition, we demonstrate the feasibility of utilizing joint signal processing of subchannels in this two-span, ROADM system.
Keywords :
optical communication equipment; optical fibre amplifiers; optical fibre communication; phase shift keying; space division multiplexing; telecommunication network routing; wavelength division multiplexing; SDM-WDM; bit rate 128 Gbit/s; cladding pumped fiber amplifier; distance 67 km; multicore erbium doped fiber amplifier; multicore transmission fiber; polarization multiplexed transmission; quadrature phase shift keyed transmission; reconfigurable optical add-drop multiplexer; space division multiplexing; spatial superchannel routing; subchannel insertion loss; two span ROADM system; wavelength division multiplexed system; Bit error rate; Frequency measurement; Mirrors; Multicore processing; Optical fiber amplifiers; Optical noise; Signal to noise ratio; Erbium-doped fiber amplifiers; optical fiber communication; optical fiber networks; wavelength routing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2013.2283912
