Title :
Performance of DBPSK in a 5 × 10 Gb/s mixed modulation format Raman/EDFA WDM system
Author :
Astar, W. ; Lenihan, A.S. ; Carter, G.M.
Author_Institution :
Lab. for Phys. Sci., College Park, MD, USA
Abstract :
The impact of varying the pulse format as well as the data format of side channels on a differential binary phase-shift-keyed (DBPSK) center channel, as a function of channel spacing and propagation distance, was examined for the first time in a 5 × 10 Gb/s Raman/erbium-doped fiber amplifier wavelength-division-multiplexed recirculating loop. The data format of the side channel was either on-off keying (OOK) or DBPSK, while its pulse format was either 50% return-to-zero or nonreturn-to-zero. For the system studied, it was found that the side channel OOK data format was always more detrimental than its pulse format to the performance of the DBPSK center channel.
Keywords :
Raman lasers; amplitude shift keying; channel spacing; differential phase shift keying; erbium; optical fibre amplifiers; optical fibre communication; optical modulation; wavelength division multiplexing; 10 Gbit/s; 50 Gbit/s; DBPSK; OOK; Raman/EDFA WDM; channel spacing; differential binary phase-shift-keying; nonreturn-to-zero pulse format; on-off keying; return-to-zero pulse format; Channel spacing; Erbium-doped fiber amplifier; Optical pulse generation; Optical signal processing; Polarization; Pulse amplifiers; Pulse modulation; Signal generators; Stimulated emission; Wavelength division multiplexing; Differential phase-shift keying (DPSK); Raman amplification; modulation formats; nonreturn-to-zero (NRZ); on–off keying (OOK); return-to-zero (RZ); wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.859173
