2011 Volume 8 Issue 21 Pages 1836-1841
This paper describes an automatic level control (ALC) technique that utilizes cross gain modulation (XGM)-based wavelength conversion to expand the upstream transmission operating areas in optically-amplified passive optical network (PON) systems. We conduct experiments to evaluate the allowable link budgets of optically-amplified PON systems using XGM-based ALC (XGM-ALC), and also show that we can achieve a large operating area with a dynamic range in a trunk span of 18.5dB against an allowable link loss range for an access span of between 8.0 and 20.0dB. The allowable link loss range of an access span can be expanded to between 8.0 and 25.0dB if the dynamic range in the trunk span is reduced to 15.5dB. A total link budget of 55.0dB is achieved.
