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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 15 — Jul. 23, 2007
  • pp: 9326–9340

Fringe generation with non-uniformly coated long-period fiber gratings

Ignacio Del Villar, Francisco J. Arregui, Ignacio R. Matias, Andrea Cusano, Domenico Paladino, and Antonello Cutolo  »View Author Affiliations


Optics Express, Vol. 15, Issue 15, pp. 9326-9340 (2007)
http://dx.doi.org/10.1364/OE.15.009326


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Abstract

In this work, the spectral characteristics of non-uniform symmetrically ring shaped coatings deposited on long-period fiber gratings (LPFGs) have been theoretically and experimentally investigated. To optimize the structure performances, the device was designed with a simulation tool based on vectorial analysis of modes in a multilayer cylindrical waveguide and coupled mode theory. Electrostatic self-assembling technique was selected to deposit with fine control uniform azimuthally symmetric coatings on the cladding of the LPFG. UV laser micromachining operating at 193nm was used to selectively remove the coating with high spatial resolution and with azimuthal symmetry. By locally and selectively removing portions of the overlay surrounding the LPFG from the middle of the grating, strong modifications of its spectral characteristics were observed. Phase-shift effects and multiple interference fringes have been observed for all the attenuation bands, strongly depending on the length of the uncoated region and the overlay features (thickness and optical properties). This provides a valid technological platform for the development of advanced photonic devices for sensing and telecommunication applications.

© 2007 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(140.2180) Lasers and laser optics : Excimer lasers
(260.2110) Physical optics : Electromagnetic optics
(310.1860) Thin films : Deposition and fabrication

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 9, 2007
Revised Manuscript: June 13, 2007
Manuscript Accepted: June 13, 2007
Published: July 13, 2007

Citation
Ignacio Del Villar, Francisco J. Arregui, Ignacio R. Matias, Andrea Cusano, Domenico Paladino, and Antonello Cutolo, "Fringe generation with non-uniformly coated long-period fiber gratings," Opt. Express 15, 9326-9340 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-15-9326


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