Non-uniform nano-coated long-period fiber gratings for sensing applications

Domenico Paladino; Antonello Cutolo; Andrea Cusano; Ignacio Del Villar; Ignacio R. Matias; Francisco J. Arregui

doi:10.1117/12.738540

2 July 2007 Non-uniform nano-coated long-period fiber gratings for sensing applications

Domenico Paladino, Antonello Cutolo, Andrea Cusano, Ignacio Del Villar, Ignacio R. Matias, Francisco J. Arregui

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66192Q (2007) https://doi.org/10.1117/12.738540
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

This work numerically and experimentally investigates the spectral modifications due to non-uniform azimuthally symmetric high refractive index (HRI) nano-coatings deposited on long-period fiber gratings (LPFGs). First, a uniform overlay was deposited on a LPFG by using electrostatic self-assembling technique, which guarantees a fine control on the coating thickness. Successively, UV (&lgr;=193nm) laser micromachining was applied to locally and selectively remove the coating with high spatial resolution and preserving the azimuthal symmetry of the structure. As the overlay removal was performed starting from the middle of the grating, strong modifications of the LPFG transmission spectrum occurred. Phase-shift phenomenon and selective fringes generation in correspondence of all the attenuation bands can be observed. The two-effects occurring are ruled by the longitudinal length of the uncoated region and the overlay features (thickness and optical properties). The wavelength selectivity, combined with the effects of the HRI coatings on the cladding modes distribution, can be successfully applied for the development of advanced and high performances sensing devices.

Citation Download Citation

Domenico Paladino, Antonello Cutolo, Andrea Cusano, Ignacio Del Villar, Ignacio R. Matias, and Francisco J. Arregui "Non-uniform nano-coated long-period fiber gratings for sensing applications", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66192Q (2 July 2007); https://doi.org/10.1117/12.738540

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