Tilted Fiber Bragg Grating photowritten in microstructured optical fiber for improved refractive index measurement.
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.
Phan Huy
Minh Châu
MC
CEA LIST, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette cedex France. minhchau.phanhuy@gmail.com
Laffont
Guillaume
G
Dewynter
Véronique
V
Ferdinand
Pierre
P
Labonté
Laurent
L
Pagnoux
Dominique
D
Roy
Philippe
P
Blanc
Wilfried
W
Dussardier
Bernard
B