Title :
Demodulation of optical DPSK using in-phase and quadrature detection
Author :
Hodgkinson, T.G. ; Harmon, R.A. ; Smith, D.W.
Author_Institution :
British Telecom Research Laboratories, Ipswich, UK
Abstract :
A 140 Mbit/s optical DPSK system experiment employing a 90 degree optical hybrid to achieve in-phase and quadrature detection is reported. The principle of the optical hybrid is outlined and the effect of polarisation misalignment on the optical performance is compared with that for standard homodyne/heterodyne detection.
Keywords :
optical communication; optical modulation; phase shift keying; 90 degree optical hybrid; in-phase detection; optical DPSK; polarisation misalignment; quadrature detection;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850612
