Optical Fiber (IMAGE) Universidad Carlos III de Madrid Caption Optic fiber is normally used in the field of telecommunications to transmit information using light, but a group of researchers at the Universidad Carlos III de Madrid has developed a technique that makes it possible to use optic fiber as a thermometer in extreme industrial environments. Credit Credit: UC3M 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.