Optical fiber sensors are one preferred solution for temperature sensing especially for their capability of distributed measurement; however, many of them still suffer from complicated and expensive fabrication and are hardly suitable for temperature sensing in all liquid, gas and solid...

In this work, we demonstrate LOFTS, a Liquid core capillary based Optical fiber Fluorescence Temperature Sensor. The temperature sensitive solution is first sealed in capillary, which is then incorporated on the tip of an optical fiber to fabricate LOFTS only relying on extremely simple...