Silk Fibroin Optical Planar Waveguides Fabricated on Acrylic Polymer Foil

We report about the optical properties of the silk fibroin layers fabricated onto the polymer foils and allyl diglycol carbonate plastic substrate. Waveguiding properties were measured by m-line spectroscopy and optical losses by the fibre scanning method. The optical losses were lower than 0.30 dB/cm at 846.4 and 1549.1 nm.