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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 10 — May. 15, 2012
  • pp: 1610–1612

Bending sensor based on intermodal interference properties of two-dimensional waveguide array fiber

S. Li, Zhi Wang, Y. Liu, T. Han, Z. Wu, C. Wei, H. Wei, J. Li, and W. Tong  »View Author Affiliations


Optics Letters, Vol. 37, Issue 10, pp. 1610-1612 (2012)
http://dx.doi.org/10.1364/OL.37.001610


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Abstract

We propose a highly sensitive bending sensor based on the intermodal interference properties of a strongly coupled two-dimentional waveguide array fiber (WAF). The interference resonance peaks formed by the SMF-WAF-SMF Mach–Zehnder interferometer are intrinsically the result of interference between the LP01-like supermode and other higher order supermodes, displaying supernormal sensitivity to bending in a wide curvature range. The bending sensitivity of the intermodal MZI is a quadratic function of curvature, and the resonance wavelength shift is up to 100 nm within a curvature range 010m1. The fabrication reveals briefness, and temperature response shows little impact on the bend sensing precision. The high bending sensitivity and wide sensing range can make this device a candidate for bending discrimination and measurement in widespread areas.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(230.7370) Optical devices : Waveguides
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 14, 2011
Revised Manuscript: January 25, 2012
Manuscript Accepted: March 12, 2012
Published: May 7, 2012

Citation
S. Li, Zhi Wang, Y. Liu, T. Han, Z. Wu, C. Wei, H. Wei, J. Li, and W. Tong, "Bending sensor based on intermodal interference properties of two-dimensional waveguide array fiber," Opt. Lett. 37, 1610-1612 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-10-1610


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