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Titolo:
SENSITIVITY IMPROVEMENT OF AN OPTICAL CURRENT SENSOR WITH ENHANCED FARADAY-ROTATION
Autore:
LI GD; KONG MG; JONES GR; SPENCER JW;
Indirizzi:
UNIV LIVERPOOL,DEPT ELECT ENGN & ELECT LIVERPOOL L69 3GJ MERSEYSIDE ENGLAND
Titolo Testata:
Journal of lightwave technology
fascicolo: 12, volume: 15, anno: 1997,
pagine: 2246 - 2252
SICI:
0733-8724(1997)15:12<2246:SIOAOC>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SINGLE-MODE FIBER; CURRENT TRANSDUCER; LINEAR BIREFRINGENCE; POLARIZATION; SYSTEMS;
Keywords:
CURRENT MEASUREMENT; FARADAY EFFECT; MAGNETOOPTIC TRANSDUCERS; OPTICAL FIBER MEASUREMENTS; OPTICAL REFLECTION; SENSITIVITY;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
G.D. Li et al., "SENSITIVITY IMPROVEMENT OF AN OPTICAL CURRENT SENSOR WITH ENHANCED FARADAY-ROTATION", Journal of lightwave technology, 15(12), 1997, pp. 2246-2252

Abstract

A sensitivity improvement technique is proposed for a class of bulk-glass optical current sensors that employ a ferromagnetic field concentrator, The total effective optical path length is demonstrated theoretically to be an invariant regardless of the bulk glass thickness and consequently independent of the size of the concentrator gap opening, Thus, if the magnetic field is increased by reducing the gap size, the eventual Faraday rotation for a given electric current can be increased proportionally, leading to an improved device sensitivity, The dependence of the gap magnetic field on gap size is calculated with an equivalent circuit model, and this analytical treatment is compared with adedicated finite element computer package, By taking account of various types of optical power losses present in the bulk glass, the above formulated gap dependence of magnetic field is used to aid a realisticassessment of device sensitivity and this serves as a tool to design and analyze practical bulk-glass optical current sensors, A detailed experimental study to confirm the proposed sensitivity improvement technique is also reported.

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Documento generato il 30/11/20 alle ore 03:21:47