High-index overlay gratings on K/sup +/-exchanged waveguides in BK-7 glass using excimer laser ablation
- Resource Type
- Conference
- Authors
- Pissadakis, S.; Reekie, L.; Zervas, M.N.; Wilkinson, J.S.; Moschovis, K.; Kiriakidis, G.
- Source
- Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39 (IEEE Cat. No.00CH37088) Lasers and electro-optics Lasers and Electro-Optics, 2000. (CLEO 2000). Conference on. :316-317 2000
- Subject
- Photonics and Electrooptics
Components, Circuits, Devices and Systems
Optical waveguides
Bragg gratings
Integrated optics
Optical filters
Optical surface waves
Electron optics
Particle beam optics
Optical films
Optical fiber communication
Electron beams
- Language
Summary form only given.Bragg relief gratings overlaid on optical waveguides may be used as high-extinction ratio wavelength filters with applications in integrated optics and optical communications. Bragg gratings have been written using electron beam lithography and etching on a complex waveguide structure consisting of a thin silicon overlay on ion diffused waveguides in LiNbO/sub 3/. This configuration enhances the guided field closer to the surface resulting in strong interaction with the film region. A new waveguide grating design process which relies on a novel grating patterning method and new materials will be presented in this paper. This design consists of the combination of a potassium ion-exchanged single-mode channel waveguide with a high index film (InO/sub x/) overlaid on its upper surface.