Effects of thickness and external refractive index in coated tilted fiber Bragg gratings

D. Paladino; P. Pilla; A. Cutolo; S. Campopiano; M. Giordano; A. Cusano; C. Caucheteur; P. Mégret

doi:10.1117/12.738558

2 July 2007 Effects of thickness and external refractive index in coated tilted fiber Bragg gratings

D. Paladino, P. Pilla, A. Cutolo, S. Campopiano, M. Giordano, A. Cusano, C. Caucheteur, P. Mégret

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66192X (2007) https://doi.org/10.1117/12.738558
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

In this work, an experimental analysis on the spectral effects induced by depositing a uniform high refractive index (HRI) thin coating on weakly tilted fiber Bragg gratings (TFBGs) is carried out. First, two weakly TFBGs presenting different tilt angles were fabricated. Successively, by using dip-coating technique, two different coating thicknesses were deposited on each of them. The transmission spectra of the obtained structures were collected as the surrounding refractive index (SRI) changed in the range 1÷1.47. The coated gratings present some differences in their spectral evolution, that can be opportunely exploited. The coated configuration could improve some aspects of previous demodulation techniques exploited in the case of bare TFBGs. Moreover, an important effect of HRI coatings is to enhance the SRI sensitivity of the spectral position of the dips corresponding to cladding modes coupling, leading to a different interrogation method for sensing applications.

Citation Download Citation

D. Paladino, P. Pilla, A. Cutolo, S. Campopiano, M. Giordano, A. Cusano, C. Caucheteur, and P. Mégret "Effects of thickness and external refractive index in coated tilted fiber Bragg gratings", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66192X (2 July 2007); https://doi.org/10.1117/12.738558

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available