Title :
Optical /spl pi//2-DPSK and its tolerance to filtering and polarization-mode dispersion
Author :
Wei, X. ; Gnauck, A.H. ; Gill, D.M. ; Liu, X. ; Koc, U.-V. ; Chandrasekhar, S. ; Raybon, G. ; Leuthold, J.
Author_Institution :
Bell Labs., Murray Hill, NJ, USA
Abstract :
Optical /spl pi//2 differential phase-shift keying (/spl pi//2-DPSK) is a modulation technique which encodes the binary information in relative phase shifts of /spl pi//2 and -/spl pi//2 between adjacent optical pulses. Here, we experimentally demonstrate /spl pi//2-DPSK at the bit rate of 42.7 Gb/s. It is found that /spl pi//2-DPSK outperforms conventional DPSK in the presence of strong optical filtering and polarization-mode dispersion (PMD).
Keywords :
differential phase shift keying; optical fibre communication; optical fibre dispersion; optical fibre filters; 42.7 Gbit/s; LiNbO/sub 3/ Mach-Zehnder modulators; adjacent optical pulses; binary information encoding; eye diagrams; modulation technique; optical /spl pi//2-DPSK; polarization-mode dispersion; relative phase shifts; strong optical filtering; Bit rate; Differential phase shift keying; Differential quadrature phase shift keying; Filtering; Optical filters; Optical modulation; Optical pulses; Phase modulation; Polarization mode dispersion; Pulse modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.818661
