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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 25 — Sep. 1, 2011
  • pp: E184–E188

Optical fiber refractometry based on multimode interference

Orlando Frazão, Susana O. Silva, Jaime Viegas, Luís A. Ferreira, Francisco M. Araújo, and José L. Santos  »View Author Affiliations


Applied Optics, Vol. 50, Issue 25, pp. E184-E188 (2011)
http://dx.doi.org/10.1364/AO.50.00E184


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Abstract

This paper presents an overview of optical fiber sensors based on multimode interference with a focus on refractometric applications. A specific configuration is presented to measure the refractive index of the surrounding liquid based on the Fresnel reflection in the fiber tip, combined with a simple interrogation technique that uses two fiber Bragg gratings as discrete optical sources, with the measurand information encoded in the relative intensity variation of the reflected signals. A resolution of 1.75 × 10 3 RIU is achieved.

© 2011 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry

History
Original Manuscript: March 17, 2011
Revised Manuscript: August 12, 2011
Manuscript Accepted: August 12, 2011
Published: August 19, 2011

Citation
Orlando Frazão, Susana O. Silva, Jaime Viegas, Luís A. Ferreira, Francisco M. Araújo, and José L. Santos, "Optical fiber refractometry based on multimode interference," Appl. Opt. 50, E184-E188 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-25-E184


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