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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 399–401

Optical fiber refractometer based on cladding-mode Bragg grating

Ming Han, Fawen Guo, and Yongfeng Lu  »View Author Affiliations

Optics Letters, Vol. 35, Issue 3, pp. 399-401 (2010)

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We demonstrate an optical fiber refractometer based on a cladding-mode Bragg grating. It consists of a long-period grating (LPG) followed by a fiber Bragg grating (FBG). The LPG partially couples light from the core mode to a cladding mode, both of which are reflected by the FBG. Part of the cladding mode reflection is coupled back to the core mode through the original LPG and used for refractive index sensing. The core mode reflection is used to compensate for the temperature cross sensitivity of the refractometer. The sensors operate in the reflection mode and can be multiplexed on a fiber in wavelength domain.

© 2010 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 22, 2009
Revised Manuscript: November 29, 2009
Manuscript Accepted: December 18, 2009
Published: January 29, 2010

Virtual Issues
Vol. 5, Iss. 4 Virtual Journal for Biomedical Optics

Ming Han, Fawen Guo, and Yongfeng Lu, "Optical fiber refractometer based on cladding-mode Bragg grating," Opt. Lett. 35, 399-401 (2010)

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