Title :
Merits of DQPSK for ultrahigh capacity transmission
Author :
Morita, Itsuro ; Yoshikane, Noboru
Author_Institution :
KDDI R&D Labs. Inc., Saitama, Japan
Abstract :
The use of DQPSK is quite effective to expand the aggregate capacity in WDM systems by increasing the spectral efficiency. By using optically filtered RZ-DQPSK, 1.6 bit/s/Hz spectral efficiency is achieved without polarization demultiplexing and the achieved spectral efficiency enables 5.12 Tbit/s transmission with the conventional C-band EDFA repeaters.
Keywords :
differential phase shift keying; erbium; optical fibre amplifiers; optical fibre communication; optical filters; optical repeaters; quadrature phase shift keying; wavelength division multiplexing; 4 to 8 Gbit/s; 5.12 Tbit/s; C-band EDFA; DQPSK; WDM systems; aggregate capacity; optical repeaters; optically filtered RZ-DQPSK; spectral efficiency; ultrahigh capacity transmission; Bandwidth; Demultiplexing; Nonlinear optics; Optical crosstalk; Optical filters; Optical interferometry; Optical receivers; Optical sensors; Optical transmitters; Wavelength division multiplexing;
Conference_Titel :
Lasers and Electro-Optics Society, 2005. LEOS 2005. The 18th Annual Meeting of the IEEE
Print_ISBN :
0-7803-9217-5
DOI :
10.1109/LEOS.2005.1548091
