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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4172–4174

Leakage coupling of ultrasensitive periodical silica thin-film long-period grating coated on tapered fiber

Cheng-Ling Lee, Zi-Yu Weng, Chuan-Jung Lin, and YuanYao Lin  »View Author Affiliations


Optics Letters, Vol. 35, Issue 24, pp. 4172-4174 (2010)
http://dx.doi.org/10.1364/OL.35.004172


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Abstract

This investigation demonstrates leakage coupling between fundamental-mode and high-order mode resonance based on a periodical silica thin-film long-period grating (TFLPG) that was coated on a tapered fiber when wavelengths longer than the fundamental-mode cutoff were propagated. For the leaky guiding situation, these leakage modes still may exhibit strong mode coupling in the taper with the assistance of the TFLPG when the phase-matched condition is satisfied. An extremely high tuning efficiency of 62.9 nm / ° C , which is equivalent to a measurement of sensitivity of approximately 168 , 182 nm per refractive index unit, is achieved. To the best of our knowledge, this sensitivity is the highest achieved for a fiber sensor to date.

© 2010 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.2340) Fiber optics and optical communications : Fiber optics components
(310.1860) Thin films : Deposition and fabrication
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 20, 2010
Revised Manuscript: November 10, 2010
Manuscript Accepted: November 14, 2010
Published: December 13, 2010

Citation
Cheng-Ling Lee, Zi-Yu Weng, Chuan-Jung Lin, and YuanYao Lin, "Leakage coupling of ultrasensitive periodical silica thin-film long-period grating coated on tapered fiber," Opt. Lett. 35, 4172-4174 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-24-4172


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