Components of remote fiber testing system for optical subscriber network

For the purpose of expanding optical subscriber network, not only optical fiber cables with high reliability and low cost but also cost reduction of construction and maintenance for optical network are required. Recently remote fiber testing system, which automatically tests for all optical fibers using OTDR and optical switch, has been developed. This system can detect fault location in optical network and immediately give a warning to manager of network. We investigated practical technologies which are employed in each component of the remote fiber testing system, then achieved its high performance, easy operation and cost reduction. This paper reports keytechnologies of optical switch, coupler module, optical code with filter, test equipment, controller and operation software, that are main components used in the optical fiber testing system.