Title :
High spectral density long-haul 40-Gb/s transmission using CSRZ-DPSK format
Author :
Zhu, B. ; Nelson, L.E. ; Stulz, S. ; Gnauck, A.H. ; Doerr, C. ; Leuthold, J. ; Grüner-Nielsen, L. ; Pedersen, M.O. ; Kim, J. ; Lingle, R.L., Jr.
Author_Institution :
OFS, Holmdel, NJ, USA
Abstract :
This paper presents an experimental investigation of 40-Gb/s DWDM transmission technologies that can potentially transport multiple terabits of aggregate capacity with ultrahigh spectral efficiency over several thousand kilometers of fiber in a terrestrial optical network. By using carrier-suppressed return-to-zero (CSRZ) differential-phase-shift-keyed (DPSK) modulation format with optimized signal filtering, we have demonstrated transmission of 6.4-Tb/s capacity with 0.8-bit/s/Hz spectral efficiency over 3200 km of fiber using 100-km amplified spans. This transmission was conducted using 160 50-GHz-spaced wavelength channels, each at 42.7 Gb/s, in the standard C + L wavelength bands. Low dispersion-slope TrueWave REACH fiber plus slope-matched dispersion compensating fiber with all-Raman amplification were also employed to achieve this record 20-Pbit/s/km capacity-distance product for terrestrial 40-Gb/s systems. In addition, we used a loop-synchronous polarization controller (PC) to better emulate the polarization effects of a straight-line system.
Keywords :
Raman lasers; differential phase shift keying; optical communication equipment; optical fibre amplifiers; optical fibre dispersion; optical fibre networks; optical fibre polarisation; optical modulation; wavelength division multiplexing; 100 km; 100-km amplified spans; 20 Pbit/s; 20-Pbit/km capacity distance; 3200 km; 40 Gbit/s; 40-Gb/s DWDM transmission technology; 42.7 Gbit/s; 50-GHz-spaced wavelength channels; 6.4 Tbit/s; 6.4-Tb/s Gb/s; C+L wavelength bands; CSRZ-DPSK format; aggregate capacity; all-Raman amplification; carrier-suppressed return-to-zero differential-phase-shifted keyed modulation format; high spectral density; high-bit rate transmission; long-haul 40-Gb/s transmission; loop-synchronous polarization controller; low dispersion-slope TrueWave REACH fiber; optimized signal filtering; polarization effects; slope-matched dispersion compensating fiber; terrestrial optical network; ultrahigh spectral efficiency; Aggregates; Channel spacing; Filtering; Forward error correction; Modulation; Optical fiber communication; Optical fiber dispersion; Optical fiber networks; Optical fiber polarization; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.822165
