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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 3 — Feb. 4, 2008
  • pp: 2252–2263

Laser-micromachined Fabry-Perot optical fiber tip sensor for high-resolution temperature-independent measurement of refractive index

Z. L. Ran, Y. J. Rao, W. J. Liu, X. Liao, and K. S. Chiang  »View Author Affiliations

Optics Express, Vol. 16, Issue 3, pp. 2252-2263 (2008)

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We propose and demonstrate a Fabry-Perot (F-P) optical fiber tip sensor for high-resolution refractive-index measurement fabricated by using 157-nm laser micromachining, for the first time to our knowledge. The sensor head consists of a short air F-P cavity near the tip of a single-mode fiber and the fiber tip. The external refractive index is determined according to the maximum fringe contrast of the interference fringes in the reflective spectrum of the sensor. Such a sensor can provide temperature-independent measurement of practically any refractive index larger than that of air and offers a refractive-index resolution of ~4×10-5 in its linear operating range. The experimental data agree well with the theoretical results.

© 2008 Optical Society of America

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.3390) Lasers and laser optics : Laser materials processing

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: November 8, 2007
Revised Manuscript: December 27, 2007
Manuscript Accepted: December 27, 2007
Published: February 1, 2008

Virtual Issues
Vol. 3, Iss. 3 Virtual Journal for Biomedical Optics

Z. L. Ran, Y. J. Rao, W. J. Liu, X. Liao, and K. S. Chiang, "Laser-micromachined Fabry-Perot optical fiber tip sensor for high-resolution temperature-independent measurement of refractive index," Opt. Express 16, 2252-2263 (2008)

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