Open AccessLarge-mode-area infrared guiding in ultrafast laser written waveguides in Sulfur-based chalcogenide glasses
Author(s) -
C. D’Amico,
Guanghua Cheng,
Cyril Mauclair,
Johann Trolès,
Laurent Calvez,
Virginie Nazabal,
Céline Caillaud,
G. Martín,
B. Arezki,
E. Lecoarer,
P. Kern,
Razvan Stoian
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.013091
Subject(s) - chalcogenide , optics , materials science , refractive index , chalcogenide glass , ultrashort pulse , laser , infrared , laser linewidth , optoelectronics , physics
Current demands in astrophotonics impose advancing optical functions in infrared domains within embedded refractive index designs. We demonstrate concepts for large-mode-area guiding in ultrafast laser photowritten waveguides in bulk Sulfur-based chalcogenide glasses. If positive index contrasts are weak in As2S3, Ge doping increases the matrix rigidity and allows for high contrast (10(-3)) positive refractive index changes. Guiding with variable mode diameter and large-mode-area light transport is demonstrated up to 10 μm spectral domain using transverse slit-shaped and evanescently-coupled multicore traces.