Magneto-optical electric-current sensor with enhanced sensitivity

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Journal / PublicationMeasurement Science and Technology
Issue number7
Publication statusPublished - Jul 2002


In this design note, an air-gapped ring core type Faraday-effect optical current sensor using a new sensing element design is described. The sensing element is a finely polished glass prism with highly reflective coating on the two end surfaces, which is designed in such a way that the light beam propagating through it undergoes 20 critical-angle reflections at the glass-air interfaces. The current sensitivity of this new design is almost three times higher than that of a previous design based on a similar principle.

Research Area(s)

  • Critical angle reflection, Electric current measurement, Faraday effect, Magneto-optic sensor