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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 9 — May. 1, 2014
  • pp: 2763–2766

High-sensitivity dispersive Mach–Zehnder interferometer based on a dissimilar-doping dual-core fiber for sensing applications

Hugo F. Martins, J. Bierlich, K. Wondraczek, S. Unger, J. Kobelke, K. Schuster, M. B. Marques, M. Gonzalez-Herraez, and O. Frazão  »View Author Affiliations


Optics Letters, Vol. 39, Issue 9, pp. 2763-2766 (2014)
http://dx.doi.org/10.1364/OL.39.002763


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Abstract

A dual-core fiber in which one of the cores is doped with germanium and the other with phosphorus is used as an in-line Mach–Zehnder dispersive interferometer. By ensuring an equal length but with different dispersion dependencies in the interferometer arms (the two cores), high-sensitivity strain and temperature sensing are achieved. Opposite sensitivities for high and low wavelength peaks were also demonstrated when strain and temperature was applied. To our knowledge this is the first time that such behavior is demonstrated using this type of in-line interferometer based on a dual-core fiber. A sensitivity of (0.102±0.002)nm/με, between 0and800με and (4.2±0.2)nm/°C between 47°C and 62°C is demonstrated.

© 2014 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 4, 2014
Manuscript Accepted: March 27, 2014
Published: April 30, 2014

Citation
Hugo F. Martins, J. Bierlich, K. Wondraczek, S. Unger, J. Kobelke, K. Schuster, M. B. Marques, M. Gonzalez-Herraez, and O. Frazão, "High-sensitivity dispersive Mach–Zehnder interferometer based on a dissimilar-doping dual-core fiber for sensing applications," Opt. Lett. 39, 2763-2766 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-9-2763


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