Resonantly Enhanced Faraday Rotation in an Microcoil Current Sensor

Author

Chen, George Yuhui ; Lee, Timothy ; Ismaeel, Rand ; Brambilla, Gilberto ; Newson, Trevor Peter

Author_Institution

Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK

Volume

24

Issue

10

fYear

2012

fDate

5/15/2012 12:00:00 AM

Firstpage

860

Lastpage

862

Abstract

A proof-of-principle experimental demonstration with theoretical modeling is presented for resonantly enhanced Faraday rotation in a microcoil current sensor. The recirculation of resonant light within the coil gives rise to an accumulated polarization rotation and thus improved responsivity. According to simulations, microcoil resonators with sharper resonances could offer significantly larger enhancements. This new type of current sensor has the potential to be ultrafast, compact, and low-cost.

Keywords

Faraday effect; coils; electric current measurement; electric sensing devices; fibre optic sensors; magneto-optical sensors; micromechanical resonators; microsensors; accumulated polarization rotation; microcoil current sensor; microcoil resonator; resonant light recirculation; resonantly enhanced Faraday rotation; Faraday effect; Optical fiber polarization; Optical fiber sensors; Optical polarization; Current sensor; Faraday effect; microcoil resonator;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2189381

Filename

6159058