Title :
Conventional DPSK versus symmetrical DPSK: comparison of dispersion tolerances
Author :
Wang, Jin ; Kahn, Joseph M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA, USA
fDate :
6/1/2004 12:00:00 AM
Abstract :
Differential phase-shift keying (DPSK) encodes information in the phase difference Δφ between successive symbols. In conventional DPSK (CDPSK), Δφ assumes values in the set {0,π}, while in symmetrical DPSK (SDPSK), Δφ assumes values in the set {π/2,-π/2}. It is shown by numerical analysis that return-to-zero (RZ)-CDPSK is more robust to chromatic dispersion, while RZ-SDPSK is more robust to first-order polarization-mode dispersion if strong optical filtering is applied.
Keywords :
differential phase shift keying; encoding; optical fibre communication; optical fibre dispersion; optical fibre polarisation; optical filters; optical modulation; RZ-SDPSK; chromatic dispersion; conventional DPSK; differential phase-shift keying; encoding; first-order polarization-mode dispersion; optical filtering; phase difference; return-to-zero-CDPSK; symmetrical DPSK; Band pass filters; Differential quadrature phase shift keying; Filtering; Optical fiber dispersion; Optical filters; Optical interferometry; Optical modulation; Optical noise; Optical receivers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.827415
