Abstract
Planar polymer lightguides ofpoly-(methyl methacrylate) (PMMA) are doped with a UV
sensitive material and an azo dye, sensitive for green or blue light (514, 488 nm) simultaneously.
The UV-sensitive material is used for recording a permanent waveguide pattern
while the azo dye is meant for a reversible light induced refractive index change. Although
the azo dye is partly destroyed by the UV light and the photochemical reaction during waveguide
formation, a light induced phase modulation in the guide is still possible in such
bifunctional materials.
