Micromachined optical fiber current sensor

R. L. Heredero; Ramón Fernández De Caleya; Héctor Guerrero; Pere Los Santos; Mari Cruz Acero; Jaume Esteve

doi:10.1364/AO.38.005298

Micromachined optical fiber current sensor

R. L. Heredero, Ramón Fernández De Caleya, Héctor Guerrero, Pere Los Santos, Mari Cruz Acero, Jaume Esteve

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

We describe a micromachined optical fiber current sensor. The sensing element consists of a squared silicon membrane (8 mm long and 20 μm thick) that has a cylindrical permanent magnet (NdFeB alloy, 3-mm diameter, 1.5 mm high) fixed on its central region. This structure allows the permanent magnet to vibrate in the presence of the magnetic field gradient generated by an ac. A linear relation between the electrical current and the magnet displacement was measured with white-light interferometry with an optical fiber low-finesse Fabry–Perot microcavity. A measurement range of 0–70 A and a minimum detectable intensity of 20 mA were obtained when distance D between the membrane and the electrical power line was 5 mm. The output signal directly shows a linear response with distance D. © 1999 Optical Society of America.

Original language	English
Pages (from-to)	5298-5305
Journal	Applied Optics
Volume	38
Issue number	25
DOIs	https://doi.org/10.1364/AO.38.005298
Publication status	Published - 1 Sept 1999

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title = "Micromachined optical fiber current sensor",

abstract = "We describe a micromachined optical fiber current sensor. The sensing element consists of a squared silicon membrane (8 mm long and 20 μm thick) that has a cylindrical permanent magnet (NdFeB alloy, 3-mm diameter, 1.5 mm high) fixed on its central region. This structure allows the permanent magnet to vibrate in the presence of the magnetic field gradient generated by an ac. A linear relation between the electrical current and the magnet displacement was measured with white-light interferometry with an optical fiber low-finesse Fabry–Perot microcavity. A measurement range of 0–70 A and a minimum detectable intensity of 20 mA were obtained when distance D between the membrane and the electrical power line was 5 mm. The output signal directly shows a linear response with distance D. {\textcopyright} 1999 Optical Society of America.",

author = "Heredero, {R. L.} and Caleya, {Ram{\'o}n Fern{\'a}ndez De} and H{\'e}ctor Guerrero and Santos, {Pere Los} and Acero, {Mari Cruz} and Jaume Esteve",

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T1 - Micromachined optical fiber current sensor

AU - Heredero, R. L.

AU - Caleya, Ramón Fernández De

AU - Guerrero, Héctor

AU - Santos, Pere Los

AU - Acero, Mari Cruz

AU - Esteve, Jaume

PY - 1999/9/1

Y1 - 1999/9/1

N2 - We describe a micromachined optical fiber current sensor. The sensing element consists of a squared silicon membrane (8 mm long and 20 μm thick) that has a cylindrical permanent magnet (NdFeB alloy, 3-mm diameter, 1.5 mm high) fixed on its central region. This structure allows the permanent magnet to vibrate in the presence of the magnetic field gradient generated by an ac. A linear relation between the electrical current and the magnet displacement was measured with white-light interferometry with an optical fiber low-finesse Fabry–Perot microcavity. A measurement range of 0–70 A and a minimum detectable intensity of 20 mA were obtained when distance D between the membrane and the electrical power line was 5 mm. The output signal directly shows a linear response with distance D. © 1999 Optical Society of America.

AB - We describe a micromachined optical fiber current sensor. The sensing element consists of a squared silicon membrane (8 mm long and 20 μm thick) that has a cylindrical permanent magnet (NdFeB alloy, 3-mm diameter, 1.5 mm high) fixed on its central region. This structure allows the permanent magnet to vibrate in the presence of the magnetic field gradient generated by an ac. A linear relation between the electrical current and the magnet displacement was measured with white-light interferometry with an optical fiber low-finesse Fabry–Perot microcavity. A measurement range of 0–70 A and a minimum detectable intensity of 20 mA were obtained when distance D between the membrane and the electrical power line was 5 mm. The output signal directly shows a linear response with distance D. © 1999 Optical Society of America.

U2 - 10.1364/AO.38.005298

DO - 10.1364/AO.38.005298

M3 - Article

SN - 1559-128X

VL - 38

SP - 5298

EP - 5305

JO - Applied Optics

JF - Applied Optics

IS - 25

ER -

Micromachined optical fiber current sensor

Abstract

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