Sensitivity Characteristics Tuning in Tapered Long-Period Gratings by Nanocoatings

The experimental analysis of the response of nanocoated tapered long-period gratings to surrounding refractive index (SRI) changes is presented. The modal transition is demonstrated to be an effective method to improve their SRI sensitivity over a broad SRI range. The dip-coating method is shown to...

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Bibliographic Details
Published in:IEEE photonics technology letters 2007-10, Vol.19 (19), p.1517-1519
Main Authors: Pilla, P., Giordano, M., Korwin-Pawlowski, M.L., Bock, W.J., Cusano, A.
Format: Article
Language:English
Subjects:
Coatings
Deposition
Dip coating
Dip coatings
Fiber gratings
Fiber lasers
Laser tuning
Long-period gratings (LPGs)
Nanocomposites
Nanomaterials
Nanostructure
Optical device fabrication
Optical fiber devices
Optical fibers
Refractive index
refractive index sensors
Scanning electron microscopy
syndiotactic polystyrene (sPS)
thin film coatings
Thin film sensors
Tuning
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Summary:The experimental analysis of the response of nanocoated tapered long-period gratings to surrounding refractive index (SRI) changes is presented. The modal transition is demonstrated to be an effective method to improve their SRI sensitivity over a broad SRI range. The dip-coating method is shown to be a reliable technique for the deposition of conformal coatings with the necessary thickness control to tune the transition region in the desired SRI range.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2007.903779