Fabrication of c-band resonant structures in rib waveguides Available to Purchase

With the drive towards fabrication of “on-chip” optical technologies, there is a need to develop effective, compact, optical components. In this paper we present results on the fabrication of ridge waveguide structures using SU8 which are processed using direct laser ablation in order to rapidly prototype functional devices (operating in the communications band) such as Bragg filters. Laser ablation allows excellent control of the positioning and depth of ablated features within the waveguide, allowing an opportunity to tailor the reflectivity (in the case of a Bragg grating) of the structure while minimising out of plane losses (in order to maintain an efficient optical device).