Title :
Polarization modulated direct detection optical transmission systems
Author :
Betti, S. ; de Marchis, G. ; Iannone, E.
Author_Institution :
Fondazione Ugo Bordoni, Rome, Italy
fDate :
12/1/1992 12:00:00 AM
Abstract :
A novel polarization modulated direct detection (PM-DD) system suitable both for binary and multilevel transmission is presented. At the transmitter the optical field is polarization modulated by a standard modulator. The receiver is based on the estimation of the Stokes parameters of the received optical field by means of a direct-detection optical front end and baseband electrical processing. The Poincare sphere rotation induced by the fiber is compensated by means of a purely electronic algorithm and the decision is performed in the Stokes space. The system performance is evaluated by an analytical model when the only relevant noise source is the receiver thermal noise and when erbium-doped optical amplifiers introduce amplified spontaneous emission (ASE) noise. The system is completely compatible with a direct-detection-based optical network, and it is possible to implement efficient multilevel modulation formats
Keywords :
light polarisation; optical links; optical modulation; random noise; superradiance; thermal noise; ASE noise; Er doped optical amplifiers; PM-DD optical transmission systems; Poincare sphere rotation; Stokes parameters; Stokes space; amplified spontaneous emission; analytical model; baseband electrical processing; binary transmission; electronic algorithm; fiber; multilevel transmission; noise source; optical field; optical front end; polarization modulated direct detection; receiver; thermal noise; transmitter; Baseband; Optical detectors; Optical fiber polarization; Optical modulation; Optical noise; Optical polarization; Optical receivers; Optical transmitters; Stokes parameters; System performance;
Journal_Title :
Lightwave Technology, Journal of
