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In this paper, we present an experimental and theoretical study on how thermal fiber annealing influences the temperature dependence of the interferometric fiber-optic current sensor. Such sensors measure the current-induced phase shift (Faraday effect) between left and right circularly polarized light waves in a reflective fiber coil around the current conductor. The fiber-optic phase retarder at...
Fiber-optic wave retarders made from a short section of polarization-maintaining (pm) fiber are crucial components of interferometric fiber-optic current sensors for high-voltage substations [1]. Another potential application of such retarders is in chiral spectroscopy, e. g. for the detection of specific molecules. In a fiber-optic current sensor, as considered here, the magnetic field of the current...
This paper presents investigations in focused ion beam structuring and modification of indium phosphide/indium gallium arsenide phosphide based photonic crystal power splitters. The optical transmission and splitting ratio were compared to devices fabricated with electron beam lithography and inductively-coupled plasma, reactive ion etching. Prototyping of novel photonic designs, chip modifications,...
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