title: Small core rib waveguides with embedded gratings in As2Se3 glass.
abstract: Low-loss shallow-rib waveguides were fabricated using As2Se3 chalcogenide glass and polyamide-imide polymer. Waveguides were patterned directly in the As2Se3 layer by photodarkening followed by selective wet etching. Theory predicted a modal effective area of 3.5-4 microm2, and this was supported by near-field modal measurements. The Fabry-Perot technique was used to estimate propagation losses as low as ~0.25 dB/cm. First-order Bragg gratings near 1550 nm were holographically patterned in some waveguides. The Bragg gratings exhibited an index modulation on the order of 0.004. They were used as a means to assess the modal effective indices of the waveguides. Small core As2Se3 waveguides with embedded Bragg gratings have potential for realization of all-optical Kerr effect devices.
authors.forename: N
authors.initials: N
authors.lastname: Ponnampalam
authors.forename: R
authors.initials: R
authors.lastname: Decorby
authors.forename: H
authors.initials: H
authors.lastname: Nguyen
authors.forename: P
authors.initials: P
authors.lastname: Dwivedi
authors.forename: C
authors.initials: C
authors.lastname: Haugen
authors.forename: J
authors.initials: J
authors.lastname: McMullin
authors.forename: S
authors.initials: S
authors.lastname: Kasap