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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 4 — Feb. 15, 2010
  • pp: 613–615

In-fiber Fabry–Perot refractometer assisted by a long-period grating

L. Mosquera, D. Sáez-Rodriguez, J. L. Cruz, and M. V. Andrés  »View Author Affiliations

Optics Letters, Vol. 35, Issue 4, pp. 613-615 (2010)

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We present an optical fiber refractometer based on a Fabry–Perot interferometer defined by two fiber Bragg gratings and an intracavity long-period grating that makes the light confined in the resonator interact with the surrounding medium. The external refractive index is monitored by the resonant frequencies of the Fabry–Perot interferometer, which can be measured either in transmission or in reflection. In this first experiment, wavelength shifts measured with a resolution of 0.1 pm have allowed one to establish a refractive index detection limit of 2.1 × 10 5 .

© 2010 Optical Society of America

OCIS Codes
(050.2230) Diffraction and gratings : Fabry-Perot
(050.2770) Diffraction and gratings : Gratings
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(280.5715) Remote sensing and sensors : Refractivity profiles

ToC Category:
Remote Sensing and Sensors

Original Manuscript: November 13, 2009
Revised Manuscript: January 15, 2010
Manuscript Accepted: January 17, 2010
Published: February 12, 2010

L. Mosquera, D. Sáez-Rodriguez, J. L. Cruz, and M. V. Andrés, "In-fiber Fabry-Perot refractometer assisted by a long-period grating," Opt. Lett. 35, 613-615 (2010)

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