Tilted Fiber Bragg Grating photowritten in microstructured optical fiber for improved refractive index measurement

Minh-Châu Phan Huy (1) , Guillaume Laffont (2) , Véronique Dewynter (2) , Pierre Ferdinand (2) , Laurent Labonté (1) , Dominique Pagnoux (1) , Philippe Roy (1) , Wilfried Blanc (3) , Bernard Dussardier (3)

1 PHOTONIQUE
2 Centre d'Etude de Saclay
3 LPMC - Laboratoire de physique de la matière condensée

We report what we believe to be the first Tilted short-period Fiber Bragg Grating photowritten in a microstructured optical fiber for refractive index measurement. We investigate the spectral sensitivity of Tilted Fiber Bragg Grating to refractive index liquid inserted into the holes of a multimode microstructured fiber. We measure the wavelength shift of the first four modes experimentally observed when calibrated oils are inserted into the fiber holes, and thus we determine the refractive index resolution for each of these modes. Moreover, a cross comparison between experimental and simulation results of a modal analysis is performed. Two simulation tools are used, respectively based on the localized functions method and on a finite element method. All results are in very good agreement.

Domaines: Optique [physics.optics]; Optique / photonique

Minh-Châu Phan Huy, Guillaume Laffont, Véronique Dewynter, Pierre Ferdinand, Laurent Labonté, et al.. Tilted Fiber Bragg Grating photowritten in microstructured optical fiber for improved refractive index measurement. Optics Express, 2006, 14 (22), pp.10359-10370. ⟨10.1364/OE.14.010359⟩. ⟨hal-00507528⟩