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Performance of DBPSK in a 5 × 10 Gb/s mixed modulation format Raman/EDFA WDM system

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3 Author(s)
Astar, W. ; Lab. for Phys. Sci., College Park, MD, USA ; Lenihan, A.S. ; Carter, G.M.

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 12 )