A distributed optical fiber alarm system of very high dynamic range

Abstract

A fiber optic alarm system is presented. It uses conventional communication fibers in their dual mode regime. The location of a detected event is made by measuring the difference between the transit time of the modes from an activated transducer to the fiber end. A fiber optic alarm system is presented. It uses conventional communication fibers in their dual mode regime. The location of a detected event is made by measuring the difference between the transit time of the modes from an activated transducer to the fiber end.