Ml. Vonbibra et al., MODE PROFILE MODIFICATION OF H-BEAM IRRADIATED WAVE-GUIDES USING UV PROCESSING( ION), Journal of non-crystalline solids, 239(1-3), 1998, pp. 121-125
Buried channel waveguides made by a direct-write focussed hydrogen ion
beam in high quality fused silica were investigated for mode and spec
tral changes under 193 nm ultra violet irradiation. The guides exhibit
ed a negative index change of approximately 10% of the core cladding d
ifference after a dose of 1 U cm(-2), and an increase in attenuation a
t infrared wavelengths. This effect could have application in tailorin
g the shape of mode field profiles for efficient coupling between wave
guides. (C) 1998 Elsevier Science B.V. All rights reserved.