Title :
Power Profile Optimization in Phase-Modulated Systems in Presence of Nonlinear Phase Noise
Author :
Lau, Alan Pak Tao ; Kahn, Joseph M.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA
Abstract :
In optical fiber transmission systems using inline amplifiers, the interaction of signal and amplifier noise through the Kerr effect leads to nonlinear (NL) phase noise that impairs detection of phase-modulated signals. We study the minimization of the total phase noise variance (linear, NL, and receiver) by using a power profile along the link that is linear (on a decibel scale) with distance. For DPSK systems with direct detection, a total variance reduction of 65% can be achieved by designing the transmitted power to be about 8 dB higher than the received power in typical terrestrial links. In addition, for a given transmitted power and received power, the optimal power profile along the link is numerically determined
Keywords :
differential phase shift keying; optical Kerr effect; optical fibre communication; optical modulation; optical noise; phase noise; DPSK; Kerr effect; nonlinear phase noise; optical fiber transmission; phase modulation; power profile optimization; Differential quadrature phase shift keying; Kerr effect; Optical fiber amplifiers; Optical fibers; Optical noise; Optical receivers; Phase detection; Phase noise; Semiconductor optical amplifiers; Signal detection; Optical fiber amplifier; optical Keer effect; phase noise;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.887373
