A Remote Sensor For Electro-optic And Magneto-optic Effects Using Fiber Optics And Heterodyne Phase Detection

Abstract

1. Birefringence Detector After the first beamsplitter we have orthogonal polarization states with differing frequency :E, = , / i jJ5eiwlt , E, = m e i W z t + * A X/2 plate precedes the second PBS and is aligned so that the input Polarization to the PBS is at 45 degrees to the PBS axes. This gives Assuming the fiber has negligible birefringence and the 0 and E of the sample are aligned along x,y then the output at the measuring the photocurrents in detectors and resp.port of the fiber is given by :I1 = ? ! ! ! (1 cos( Awt + 2D + $)) 8hv