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Título: | Micromachined optical fiber current sensor |
Autor: | Heredero, R. L.; Fernández de Caleya, R.; Guerrero, H.; Santos, P.; Acero Leal, María Cruz CSIC ORCID ; Esteve i Tintó, Jaume | Fecha de publicación: | 1999 | Editor: | Optical Society of America | Citación: | Applied Optics 38(25): 5298-5305 (1999) | Resumen: | 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. | Versión del editor: | http://dx.doi.org/10.1364/AO.38.005298 | URI: | http://hdl.handle.net/10261/258228 | DOI: | 10.1364/AO.38.005298 | Identificadores: | doi: 10.1364/AO.38.005298 issn: 1559-128X e-issn: 2155-3165 |
Aparece en las colecciones: | (IMB-CNM) Artículos |
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