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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 944–946

Sensitive liquid refractive index sensors using tapered optical fiber tips

Yi-Hsin Tai and Pei-Kuen Wei  »View Author Affiliations


Optics Letters, Vol. 35, Issue 7, pp. 944-946 (2010)
http://dx.doi.org/10.1364/OL.35.000944


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Abstract

An optical fiber sensor based on the change of optical confinement in a subwavelength tip is presented. The optical spot is substantially increased when the environmental refractive index (RI) increases from 1.3 to 1.4. By measuring the intensity of low angular spectral components, an intensity sensitivity up to 8000% per RI unit is achieved. The fiber tip sensors take advantage of the small detection volume and real-time responses. We demonstrate the application of the nanofiber sensors for measuring concentrations of acids and evaporation rates of aqueous mixtures.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: December 16, 2009
Revised Manuscript: February 1, 2010
Manuscript Accepted: February 2, 2010
Published: March 19, 2010

Virtual Issues
Vol. 5, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Yi-Hsin Tai and Pei-Kuen Wei, "Sensitive liquid refractive index sensors using tapered optical fiber tips," Opt. Lett. 35, 944-946 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-7-944


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