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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 28 — Oct. 1, 2002
  • pp: 5963–5968

Fiber-linked Faraday effect current sensor by use of a flint glass cell with dielectric-coated retardation-compensated total reflection surfaces

Toshihiko Yoshino, Masayuki Yokota, Katsugo Aoki, Ken-ichi Yamamoto, Shun Itoi, and Masatoshi Ohtaka  »View Author Affiliations


Applied Optics, Vol. 41, Issue 28, pp. 5963-5968 (2002)
http://dx.doi.org/10.1364/AO.41.005963


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Abstract

A new type of Faraday effect optical current transformer has been developed that uses a single block of square flint glass with dielectric-coated total reflection surfaces as the sensing element. Numerical calculation has shown that the coating of two dielectric layers of 45.59-nm-thick Ta2O5 and 448.35-nm-thick SiO2 films on a flint glass surface produces zero retardation total reflection for the 45° incident angle of light at λ = 840 nm with great incident angle, wavelength, and film thickness tolerances. A fiber-linked current transformer has been constructed and experimentally demonstrated to exhibit high isolation from surrounding currents as well as high stability against mechanical disturbances.

© 2002 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.2240) Optical devices : Faraday effect
(310.1620) Thin films : Interference coatings

History
Original Manuscript: September 24, 2001
Revised Manuscript: April 4, 2002
Published: October 1, 2002

Citation
Toshihiko Yoshino, Masayuki Yokota, Katsugo Aoki, Ken-ichi Yamamoto, Shun Itoi, and Masatoshi Ohtaka, "Fiber-linked Faraday effect current sensor by use of a flint glass cell with dielectric-coated retardation-compensated total reflection surfaces," Appl. Opt. 41, 5963-5968 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-28-5963

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