Title :
50-GHz channel-spacing analysis in N/spl times/2.5-Gbit/s systems
Author :
Bayart, D. ; Gauchard, S.
Author_Institution :
Alcatel Alsthom Recherche, Marcoussis, France
Abstract :
Summary form only given. Cross-phase modulation (XPM) and four-wave mixing (FWM) have been studied in a link composed of five spans of 100 km of G652 fiber (0.22 dB/km) followed by a 6-dB loss (28-dB span). It is found that FWM, not XPM, determines the maximum system capacity (the effect of XPM is overcome by self-phase modulation). However, FWM does not forbid 50-GHz spacing transmission with high SNR. Eighty channels spaced by 50 GHz are transmitted over 500 km of G652 fiber. The line amplifiers provide +5-dBm output power for all channels (+24 dBm total) with a 5.5-dB noise figure. Penalties with back-to-back are low and consist of 0.5-dB due to SNR, and of a variable part, consistent with results obtained with five channels. It is therefore possible to increase the capacity carried on G652 fiber up to 100 Tbit/s.km by only increasing the channel count and the amplifiers output powers.
Keywords :
optical fibre networks; 2.5 Gbit/s; 5.5 dB; 50 GHz; 6 dB; G652 fiber; WDM networks; channel count; channel-spacing analysis; cross-phase modulation; four-wave mixing; line amplifiers; maximum system capacity; self-phase modulation; sensitivity penalty; Chromatic dispersion; Electronic mail; Intelligent networks; Optical attenuators; Optical fiber polarization; Optical noise; Optical pulses; Power amplifiers; Pulse amplifiers; Scanning probe microscopy;
Conference_Titel :
Optical Fiber Communication Conference and Exhibit, 1998. OFC '98., Technical Digest
Conference_Location :
San Jose, CA, USA
Print_ISBN :
1-55752-521-8
DOI :
10.1109/OFC.1998.657260
