Early prototype of a chip-based photonic thermometer. The sensor is built into the chip, while light enters and exits the sensor via optical fibers. Credit: Jennifer Lauren Lee/NIST Photonic thermometers—which measure temperature using light—have been around in optical fiber form for decades. These devices, called fiber Bragg gratings, are ...
View more: New algorithm could reduce the effects of long-term drift in fiber Bragg-grating temperature sensors