A Low Loss Quantum-Dot-Doped Optical Fiber Temperature Sensor Based on Flexible Print Technology

A quantum dots optical fiber (QDOF) sensor is proposed for temperature sensing in this paper. The sensor is fabricated by the drop-on-demand inkjet printing technology. By controlling the diameter of droplet, the spacing between droplets and the number of printed layers, the QDOF is printed on the polymer substrate. The loss of QDOF is less than 0.35 dB·mm-1 at the fluorescence wavelength. The experimental results show that the temperature sensitivity of sensor is 109 pm/ °C. As far as we know, this is the first time that a QDOF sensor is manufactured by the inkjet printing technology to realize the temperature measurement.