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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 9 — Apr. 25, 2011
  • pp: 8200–8207

Optofluidic refractive-index sensor in step-index fiber with parallel hollow micro-channel

H. W. Lee, M. A. Schmidt, P. Uebel, H. Tyagi, N. Y. Joly, M. Scharrer, and P. St.J. Russell  »View Author Affiliations


Optics Express, Vol. 19, Issue 9, pp. 8200-8207 (2011)
http://dx.doi.org/10.1364/OE.19.008200


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Abstract

We present a simple refractive index sensor based on a step-index fiber with a hollow micro-channel running parallel to its core. This channel becomes waveguiding when filled with a liquid of index greater than silica, causing sharp dips to appear in the transmission spectrum at wavelengths where the glass-core mode phase-matches to a mode of the liquid-core. The sensitivity of the dip-wavelengths to changes in liquid refractive index is quantified and the results used to study the dynamic flow characteristics of fluids in narrow channels. Potential applications of this fiber microstructure include measuring the optical properties of liquids, refractive index sensing, biophotonics and studies of fluid dynamics on the nanoscale.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(130.3120) Integrated optics : Integrated optics devices
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Sensors

History
Original Manuscript: January 18, 2011
Revised Manuscript: April 3, 2011
Manuscript Accepted: April 7, 2011
Published: April 14, 2011

Virtual Issues
Vol. 6, Iss. 5 Virtual Journal for Biomedical Optics

Citation
H. W. Lee, M. A. Schmidt, P. Uebel, H. Tyagi, N. Y. Joly, M. Scharrer, and P. St.J. Russell, "Optofluidic refractive-index sensor in step-index fiber with parallel hollow micro-channel," Opt. Express 19, 8200-8207 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-9-8200


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