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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 11 — May. 23, 2011
  • pp: 10471–10484

Highly sensitive and simple method for refractive index sensing of liquids in microstructured optical fibers using four-wave mixing

Michael H. Frosz, Alessio Stefani, and Ole Bang  »View Author Affiliations

Optics Express, Vol. 19, Issue 11, pp. 10471-10484 (2011)

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We present both experimental measurements and simulations for a simple fiber-optical liquid refractive index sensor, made using only commercially available components and without advanced postprocessing of the fiber. Despite the simplicity, we obtain the highest sensitivity experimentally demonstrated to date for aqueous solutions (refractive index around 1.33), which is relevant for extensions to biosensing. The sensor is based on measuring the spectral shift of peaks arising from four-wave mixing (FWM), when filling the holes of a microstructured fiber with different liquid samples and propagating nanosecond pulses through the silica-core of the fiber. To the best of our knowledge, this is also the first experiment where a liquid is filled into the holes of a solid-core microstructured fiber to control the phase-match conditions for FWM.

© 2011 OSA

OCIS Codes
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(060.4005) Fiber optics and optical communications : Microstructured fibers
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 31, 2011
Revised Manuscript: April 29, 2011
Manuscript Accepted: April 29, 2011
Published: May 12, 2011

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

Michael H. Frosz, Alessio Stefani, and Ole Bang, "Highly sensitive and simple method for refractive index sensing of liquids in microstructured optical fibers using four-wave mixing," Opt. Express 19, 10471-10484 (2011)

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