title: Refractive index and dispersion control of ultrafast laser inscribed waveguides in gallium lanthanum sulphide for near and mid-infrared applications.
abstract: The powerful ultrafast laser inscription technique is used to fabricate optical waveguides in gallium lanthanum sulphide substrates. For the first time the refractive index profile and the dispersion of such ultrafast laser inscribed waveguides are experimentally measured. In addition the Zero Dispersion Wavelength of both the waveguides and bulk substrate is experimentally determined. The Zero Dispersion Wavelength was determined to be between 3.66 and 3.71 μm for the waveguides and about 3.61 μm for the bulk. This work paves the way for realizing ultrafast laser inscribed waveguide devices in gallium lanthanum sulphide glasses for near and mid-IR applications.
authors.forename: Giorgos
authors.initials: G
authors.lastname: Demetriou
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Bérubé
authors.forename: Réal
authors.initials: R
authors.lastname: Vallée
authors.forename: Younès
authors.initials: Y
authors.lastname: Messaddeq
authors.forename: Christian R
authors.initials: CR
authors.lastname: Petersen
authors.forename: Deepak
authors.initials: D
authors.lastname: Jain
authors.forename: Ole
authors.initials: O
authors.lastname: Bang
authors.forename: Chris
authors.initials: C
authors.lastname: Craig
authors.forename: Daniel W
authors.initials: DW
authors.lastname: Hewak
authors.forename: Ajoy K
authors.initials: AK
authors.lastname: Kar