Effective coexistence between normal- and extended-distance PON areas by using ALC-SOA

Abstract

Abstract:The dual stage optical splitter configuration is often utilized in PON systems to effectively accommodate widely-dispersed users. This paper introduces a more effective user accommodation approach that places bidirectional optical amplifiers in some branches of the optical splitter inside the central office (CO); it allows a single optical line terminal (OLT) to achieve the coexistence of normal-and extended-distance areas. To ease the issue of amplified spontaneous emission (ASE) noise, which is inherent in this system configuration, we propose to use a semiconductor optical amplifier (SOA)-based burstmode optical amplifier with a fast automatic level control (ALC) circuit for upstream amplification. Keywords: PON, access system, SOA, ALC, ASE noise Classification: Fiber-Optic Transmission for Communications References[1] N. Suzuki and J. Nakagawa, "First demonstration of full burst optical amplified GE-PON uplink with extended system budget of up to 128 ONU splits and 58 km reach," ECOC '2005, Glasgow, Scotland, Tu1.3.3, 2005 [2] R.