TY - JOUR
T1 - 1.14 b/s/Hz spectrally efficient 50 × 85.4-Gb/s transmission over 300 km using copolarized RZ-DQPSK signals
AU - Yoshikane, Noboru
AU - Morita, Itsuro
PY - 2005/1
Y1 - 2005/1
N2 - 1.14 b/s/Hz spectrally efficient 50 × 85.4-Gb/s copolarized return-to-zero differential quarternary phase-shift keying (RZ-DQPSK) signals have been transmitted over 300 km of nonzero dispersion-shifted fiber (NZ-DSF), using optical prefiltering and conventional C-band erbium-doped fiber amplifier (EDFA) repeaters. In this study, in order to enhance the spectral efficiency, the impact of optical prefiltering on the RZ-DQPSK signal was experimentally investigated in comparison to the DQPSK signal, and we found that the RZ-DQPSK signal had better sensitivity with almost the same nonlinear tolerance than the DQPSK signal even with 65-GHz bandwidth optical prefiltering.
AB - 1.14 b/s/Hz spectrally efficient 50 × 85.4-Gb/s copolarized return-to-zero differential quarternary phase-shift keying (RZ-DQPSK) signals have been transmitted over 300 km of nonzero dispersion-shifted fiber (NZ-DSF), using optical prefiltering and conventional C-band erbium-doped fiber amplifier (EDFA) repeaters. In this study, in order to enhance the spectral efficiency, the impact of optical prefiltering on the RZ-DQPSK signal was experimentally investigated in comparison to the DQPSK signal, and we found that the RZ-DQPSK signal had better sensitivity with almost the same nonlinear tolerance than the DQPSK signal even with 65-GHz bandwidth optical prefiltering.
KW - Copolarized signals
KW - Optical prefiltering
KW - Return-to-zero differential quaternary phase-shift keying (RZ-DQPSK)
KW - Spectral efficiency
KW - Wavelength-division multiplexing (WDM)
UR - http://www.scopus.com/inward/record.url?scp=13244262800&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=13244262800&partnerID=8YFLogxK
U2 - 10.1109/JLT.2004.840343
DO - 10.1109/JLT.2004.840343
M3 - Article
AN - SCOPUS:13244262800
SN - 0733-8724
VL - 23
SP - 108
EP - 114
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 1
ER -