Novel Method for Current Measurement using Single Mode Fiber

This paper presents a Fiber optic current sensor (FOCS) which employs selected cut-off single mode fiber. It is all-glass fiber supporting single mode light propagation for operating wavelength of 633 nm from the HeNe laser. A simple and modified practical setup to measure the current, based on the Faraday’s Effect is proposed. Experimental results are analyzed and a new formula has been obtained to measure the current using this practical setup.