Elimination of nonlinear PM and FM noises in optical amplifier repeater systems by squeezer

Recently, noise phenomenon, so called Gordon-Haus effect, caused by nonlinearity of fiber and spontaneous emission from optical amplifier has received much attention. In general, it is very difficult to eliminate such an effect, because the Kerr effect of fibers and the spontaneous emission noise of a conventional optical amplifier are inherent in those physics. In this paper, we show that the Gordon-Haus effect can be perfectly eliminated by applying the squeezer which is studied in the research field of squeezed state.