A High Sensitivity Temperature Sensing Probe Based on Microfiber Fabry-Perot Interference

Sensors

Zhengqi Sui¹  Zhoubing Li¹  Chunqiao Ren¹  Yue Zhang¹  Jin Li¹ 

[1] College of Information Science and Engineering, Northeastern University, Shenyang 110819, China;

关键词: fiber sensors;    temperature sensors;    Fabry-Perot interferometer;    microfiber;    PDMS;    integrated optics;   

DOI  :  10.3390/s19081819

来源: DOAJ

【 摘 要 】

In this paper, a miniature Fabry-Perot temperature probe was designed by using polydimethylsiloxane (PDMS) to encapsulate a microfiber in one cut of hollow core fiber (HCF). The microfiber tip and a common single mode fiber (SMF) end were used as the two reflectors of the Fabry-Perot interferometer. The temperature sensing performance was experimentally demonstrated with a sensitivity of 11.86 nm/°C and an excellent linear fitting in the range of 43–50 °C. This high sensitivity depends on the large thermal-expansion coefficient of PDMS. This temperature sensor can operate no higher than 200 °C limiting by the physicochemical properties of PDMS. The low cost, fast fabrication process, compact structure and outstanding resolution of less than 10⁻⁴ °C enable it being as a promising candidate for exploring the temperature monitor or controller with ultra-high sensitivity and precision.

【 授权许可】

Unknown