NOISE-ANALYSIS IN COHERENCE-MULTIPLEXED OPTICAL-FIBER COMMUNICATION-SYSTEMS

By exploiting the coherence properties of optical sources, many users can be multiplexed on to a single channel achieving a secure, asynchro nous mode of transmission, free of central network control. In this pa per an analysis of the impact of interference from unwanted users is d escribed and limitations imposed by shot, phase, and partition noise o n coherence multiplexed system performance employing LED, multimode la ser diode, DFB, and single mode Fabry-Perot laser diode sources are co nsidered and compared. The determination of the amount of delay requir ed to compensate for system limitation imposed by phase noise arising due to mismatches between transmitter and receiver interferometers to achieve a 10(-9) BER and the impact of interferometric noise in the pe rfectly matched scenario are presented. (C) 1997 Academic Press.