Magnetic field biasing in Faraday effect sensors

Autor:	R. Pérez del Real, R. Fernández de Caleya, H. Guerrero, G. Rosa
Rok vydání:	1999
Předmět:	Materials science Physics and Astronomy (miscellaneous) Optical isolator business.industry Polarization (waves) Magnetic field law.invention symbols.namesake Optics Fiber optic sensor law Magnet Faraday effect symbols Current sensor business Faraday rotator
Zdroj:	Applied Physics Letters. 74:3702-3704
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.123226
Popis:	A method for improving the performances of Faraday effect sensors, which is based in the passive magnetic field biasing of a Faraday rotator, is described. It allows obtaining reflective optical fiber sensor architectures, based on a single polarizer and a mirror-coated Faraday rotator, which exhibit linear response and maximum sensitivity. It can be achieved by means of a permanent magnet providing a 45° rotation of the polarization of the optical beam propagating through a Faraday rotator. Operation of this method in both a point magnetic field sensor and a current sensor, with a ferromagnetic ring as concentrator, has been demonstrated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2b151aa11b010c174ff2a94049296c2d https://doi.org/10.1063/1.123226 Zobrazit plný text záznamu