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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 15 — May. 20, 2012
  • pp: 3017–3023

Modeling optical microfiber loops for seawater sensing

Shanshan Wang, Jing Wang, Guoxiang Li, and Limin Tong  »View Author Affiliations

Applied Optics, Vol. 51, Issue 15, pp. 3017-3023 (2012)

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Based on resonant and waveguiding properties of optical microfiber loops, we theoretically investigated silica microfiber loop resonators (MLRs) for refractive index (RI) and salinity sensing of seawater. Dependences of sensitivity and detection limit on probing wavelength, fiber diameter, and ring diameter are calculated with typical parameters of seawater. Our results show that the sensitivity of MLRs increases with the increasing wavelength and the decreasing diameter of the microfiber. Bending loss and absorption loss are both important factors to determine the detection limit. By optimizing the parameters of the sensing system, RI sensitivity and salinity detection limit can reach 106 RI units (RIU) and 102 (10 ppm), respectively. The model presented here may be helpful for developing microscale fiber sensors for seawater detection with high sensitivity, low detection limit, and miniaturized sizes.

© 2012 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.4780) Lasers and laser optics : Optical resonators
(060.4005) Fiber optics and optical communications : Microstructured fibers
(010.1030) Atmospheric and oceanic optics : Absorption

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 17, 2012
Revised Manuscript: March 29, 2012
Manuscript Accepted: April 1, 2012
Published: May 18, 2012

Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics

Shanshan Wang, Jing Wang, Guoxiang Li, and Limin Tong, "Modeling optical microfiber loops for seawater sensing," Appl. Opt. 51, 3017-3023 (2012)

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