Applications of Faraday rotation using monomode optical fibre

Novel opto-electronic signal processing schemes for the measurement of ac and dc electric currents via the Faraday effect in monomode optical fibres are described. The problems associated with operating point drift and signal fading due to environmental perturbation are addressed and success in the laboratory environment is demonstrated. For several of these processing schemes, optical data buses are demonstrated employing transducers with zero optical power consumption.