The Effect of Phase-Shifting between Pumping and Signal Lights on Transmission Performance of Optical Fiber Communication Systems with in-Line PSA

In this paper, the effect of phase shifting between pumping light and input signal light in an optical Phase Sensitive Amplifier (PSA) on dispersion compensation for optical fiber communication systems using PSA as in line amplifiers is theoretically analyzed by computer simulation. From our simulation, we’ve got the result that the eye pattern degradation of the high speed signal increases rapidly with the accretion of fiber dispersion and also increases with the increasing of phase shift. But if the phase shift is controlled in a certain range, it won’t affect the system performance. Otherwise, the system performance will be seriously degraded. At all events, the shifting range of PSA’s phase, which shifts at both sides of zero, will be half of that which shifts at only one side.