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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3508–3511

Long period grating in multicore optical fiber: an ultra-sensitive vector bending sensor for low curvatures

Pouneh Saffari, Thomas Allsop, Adedotum Adebayo, David Webb, Roger Haynes, and Martin M. Roth  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3508-3511 (2014)
http://dx.doi.org/10.1364/OL.39.003508


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Abstract

Long period grating was UV inscribed into a multicore fiber consisting of 120 single mode cores. The multicore fiber that hosts the grating was fusion spliced into a single mode fiber at both ends. The splice creates a taper transition between the two types of fiber that produces a nonadiabatic mode evolution; this results in the illumination of all the modes in the multicore fiber. The spectral characteristics of this fiber device as a function of curvature were investigated. The device yielded a significant spectral sensitivity as high as 1.23nm/m1 and 3.57dB/m1 to the ultra-low curvature values from 0 to 1m1. This fiber device can also distinguish the orientation of curvature experienced by the fiber as the long period grating attenuation bands producing either a blue or red wavelength shift. The finite element method (FEM) model was used to investigate the modal behavior in multicore fiber and to predict the phase-matching curves of the long period grating inscribed into multicore fiber.

© 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
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 4, 2014
Revised Manuscript: March 28, 2014
Manuscript Accepted: May 7, 2014
Published: June 6, 2014

Citation
Pouneh Saffari, Thomas Allsop, Adedotum Adebayo, David Webb, Roger Haynes, and Martin M. Roth, "Long period grating in multicore optical fiber: an ultra-sensitive vector bending sensor for low curvatures," Opt. Lett. 39, 3508-3511 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3508

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