In a first, researchers apply dual frequency comb technology to photonic thermometers

https://phys.org/news/2023-08-dual-frequency-technology-photonic-thermometers.html

"faster, smaller, and more robust... 1 comb source of light and 2nd comb almost same, combined light sent to photonic thermometer, their slightly offset frequencies create beat pattern... difference creates each unique tooth in RF comb revealing temperature, accurate within 1/10k°K... interrogate photonic sensors between 10 and 1KX faster, which measure, using same light source, temperature, strain, humidity, acceleration embedded into buildings or bridges, measuring ms temperature changes in medical radiation therapy"

Related:

Researchers turn a small photonic chip into a functional temperature sensor
https://phys.org/news/2023-12-small-photonic-chip-functional-temperature.html

Researchers turn up the heat on flexible temperature sensor development using microwaves
https://techxplore.com/news/2024-01-flexible-temperature-sensor-microwaves.html