TY - JOUR
T1 - High-performance Bragg gratings in chalcogenide rib waveguides written with a modified Sagnac interferometer
AU - Shokooh-Saremi, Mehrdad
AU - Ta'eed, Vahid G.
AU - Baker, Neil J.
AU - Littler, Ian C.M.
AU - Moss, David J.
AU - Eggleton, Benjamin J.
AU - Ruan, Yinlan
AU - Luther-Davies, Barry
PY - 2006/7
Y1 - 2006/7
N2 - We demonstrate the highest-quality Bragg gratings reported to date in chalcogenide glass rib waveguides, both in strength and apodization. A modified Sagnac interferometer is employed to write gratings in As2S3-based rib waveguides, achieving an induced refractive index modulation of the order of 10-2 and a grating transmission rejection of more than 30 dB. We obtain good agreement between experimental and theoretical results based on a transfer-matrix formulation for multilayer optical structures. In addition, we report fabrication of phase-shifted Bragg gratings, as well as an investigation of the role of birefringence, higher-order modes, and aging. Finally, grating growth dynamics are investigated by in situ monitoring during writing.
AB - We demonstrate the highest-quality Bragg gratings reported to date in chalcogenide glass rib waveguides, both in strength and apodization. A modified Sagnac interferometer is employed to write gratings in As2S3-based rib waveguides, achieving an induced refractive index modulation of the order of 10-2 and a grating transmission rejection of more than 30 dB. We obtain good agreement between experimental and theoretical results based on a transfer-matrix formulation for multilayer optical structures. In addition, we report fabrication of phase-shifted Bragg gratings, as well as an investigation of the role of birefringence, higher-order modes, and aging. Finally, grating growth dynamics are investigated by in situ monitoring during writing.
UR - http://www.scopus.com/inward/record.url?scp=33748800936&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.23.001323
DO - 10.1364/JOSAB.23.001323
M3 - Article
SN - 0740-3224
VL - 23
SP - 1323
EP - 1331
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 7
ER -