Mode profile modification of H ion beam irradiated waveguides using UV processing

Abstract

Buried channel waveguides made by a direct-write focussed hydrogen ion beam in high quality fused silica were investigated for mode and spectral changes under 193 nm ultra violet irradiation. The guides exhibited a negative index change of approximately 10% of the core cladding difference after a dose of 1 kJ cm-2, and an increase in attenuation at infrared wavelengths. This effect could have application in tailoring the shape of mode field profiles for efficient cou-pling between waveguides. © 1998 Elsevier Science B.V. All rights reserved.