Title :
Sensitivity Characteristics Tuning in Tapered Long-Period Gratings by Nanocoatings
Author :
Pilla, Pierluigi ; Giordano, Michele ; Korwin-Pawlowski, Michael L. ; Bock, Wojtek J. ; Cusano, Andrea
Author_Institution :
Univ. of Sannio, Benevento
Abstract :
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.
Keywords :
diffraction gratings; dip coating; nanotechnology; optical films; optical sensors; optical tuning; refractive index; refractive index measurement; SRI sensitivity; coating deposition; conformal coatings; dip-coating; long-period gratings; modal transition; nanocoatings; refractive index; sensitivity characteristic tuning; tapered gratings; thickness control; Dip coating; Fiber gratings; Fiber lasers; Laser tuning; Optical device fabrication; Optical fiber devices; Optical fibers; Refractive index; Scanning electron microscopy; Thin film sensors; Long-period gratings (LPGs); refractive index sensors; syndiotactic polystyrene (sPS); thin film coatings;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.903779
