VTT developed an optical fibre made of cellulose

VTT researchers were able to transmit light in wood-based fibre. Optical fibre made of cellulose is best suited for sensors that benefit from the biodegradability of the material. In the future, optical cellulose fibre may allow detecting changes in the moisture level of buildings.- The core of the new optical fibre is made of cellulose, modified for the purpose using ionic solvents developed by VTT. Around the core, we made a cladding out of cellulose acetate. The R&D is still in its initial phases, so we do not yet know all the applications the new optical fibre could lend itself to, says