Waveguide with Laser (IMAGE) Optica Caption The researchers used an inkjet printing method to create the waveguide shown here. Sending laser light through the waveguide (red) allowed them to measure the waveguide's optical properties. Credit Fabian Lütolf, CSEM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.