Title :
Inscription of infrared waveguides in chalcogenide glasses by femtosecond laser
Author :
Le Coq, D. ; Caulier, O. ; Bychkov, E. ; Troles, J. ; Masselin, P.
Author_Institution :
Inst. des Sci. Chim. de Rennes, Univ. de Rennes 1, Rennes, France
Abstract :
Waveguide inscription by femtosecond laser into a glass has a complicated dependence on writing conditions, laser parameters, and glass composition. In this presentation, we will firstly focus on a new method based on a helical translation of a chalcogenide glass sample through the focal point and parallel to the laser beam. This original technique based on an inscription characterized by a negative Δn, consists in a clad writing. Under these peculiar conditions, a high symmetry of the guided mode is achieved. Next, inscription by laser filamentation that leads to a positive Δn modification due to appropriated permanent structural modifications and new geometry of the infrared waveguides will be presented and discussed.
Keywords :
chalcogenide glasses; high-speed optical techniques; laser materials processing; optical fabrication; optical waveguides; refractive index; chalcogenide glasses; femtosecond laser; glass composition; guided mode symmetry; helical translation; infrared waveguides inscription; laser filamentation; laser parameters; negative Δn; writing conditions; Glass; Laser beams; Optical waveguides; Optimized production technology; Refractive index; Ultrafast optics; Writing; chalcogenide glasses; femtosecond laser; filamentation; helical photoinscription; infrared waveguides; refractive index modifications;
Conference_Titel :
Transparent Optical Networks (ICTON), 2015 17th International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICTON.2015.7193574
