Public Release: 31-Jul-2018
Optical fibers that can 'feel' the materials around them
In recent years optical fibers have served as sensors to detect changes in temperature, like a thermometer, and pressure, like an artificial nerve. This technique is particularly useful in structures such as bridges and gas pipelines.
EPFL researchers have now come up with a new method that enables optical fibers to identify whether they are in contact with a liquid or a solid. This is achieved by simply generating a sound wave with the help from a light beam within the fiber.
https://www.eurekalert.org/pub_releases/2018-07/epfd-oft072818.php
