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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 30 — Oct. 20, 2012
  • pp: 7368–7373

Tapered-fiber-based refractive index sensor at an air/solution interface

Ping Lu, Jeremie Harris, Xiaozhen Wang, Ganbin Lin, Liang Chen, and Xiaoyi Bao  »View Author Affiliations


Applied Optics, Vol. 51, Issue 30, pp. 7368-7373 (2012)
http://dx.doi.org/10.1364/AO.51.007368


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Abstract

An approach to achieve refractive index sensing at an air and aqueous glycerol solution interface is proposed using a tapered-fiber-based microfiber Mach–Zehnder interferometer (MFMZI). Compared to a surrounding uniform medium of air or solutions, the spectral interference visibility of the MFMZI at the air/solution interface is significantly reduced due to a weak coupling between the fundamental cladding mode and high-order asymmetric cladding modes, which are extremely sensitive to the external refractive index. The MFMZI is experimentally demonstrated as an evanescent wave refractive index sensor to measure concentrations of glycerol solutions by monitoring average power attenuation of the tapered fiber.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 15, 2012
Revised Manuscript: September 17, 2012
Manuscript Accepted: September 21, 2012
Published: October 18, 2012

Citation
Ping Lu, Jeremie Harris, Xiaozhen Wang, Ganbin Lin, Liang Chen, and Xiaoyi Bao, "Tapered-fiber-based refractive index sensor at an air/solution interface," Appl. Opt. 51, 7368-7373 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-30-7368

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