Affiliation:
1. The Brunel Centre for Manufacturing Metrology, Brunel University, Middlesex UBS 3PH
Abstract
Field-installable duplex optical-fibre couplers based on bending effect are described. Addition of these couplers to a high-integrity optical-fibre bus is possible without interrupting operation. The duplex couplers are designed to have a variable tapping ratio, to power a hybrid optical-fibre sensor (OFS) and to relaunch a digital output from the sensor into the bus. A low-power microelectronic sensor which is optically powered via the bus fibre is described, and a two-sensor system configuration has been successfully demonstrated.