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A High Sensitivity Temperature Sensing Probe Based on Microfiber Fabry-Perot Interference
Zhoubing Li1, Yue Zhang2, Chunqiao Ren3
1College of Information Science and Engineering, Northeastern University, Shenyang 110819, China. lizhoubing50@163.com.
Sensors (Basel, Switzerland)
|April 19, 2019
Summary
A new miniature Fabry-Perot temperature probe uses polydimethylsiloxane (PDMS) and a microfiber for highly sensitive temperature monitoring. This compact sensor offers precise measurements below 10-4 °C.
Area of Science:
- Optoelectronics
- Materials Science
- Sensor Technology
Background:
- Accurate temperature monitoring is crucial in various scientific and industrial applications.
- Existing fiber optic sensors often face limitations in sensitivity, cost, or fabrication complexity.
Purpose of the Study:
- To design and demonstrate a miniature, high-sensitivity fiber optic temperature probe.
- To leverage the properties of polydimethylsiloxane (PDMS) for enhanced thermal sensing.
Main Methods:
- Fabrication of a Fabry-Perot interferometer using a microfiber encapsulated in hollow core fiber (HCF) with PDMS.
- Utilizing the microfiber tip and a single mode fiber (SMF) end as interferometer reflectors.
- Experimental characterization of the temperature sensing performance.
Main Results:
- Achieved a high temperature sensitivity of 11.86 nm/°C within the 43-50 °C range.
- Demonstrated excellent linearity in temperature sensing performance.
- The sensor's performance is attributed to the large thermal-expansion coefficient of PDMS.
- Operational temperature limit is 200 °C due to PDMS properties.
Conclusions:
- The developed PDMS-based Fabry-Perot temperature probe offers ultra-high sensitivity and precision (<10-4 °C).
- Its low cost, compact structure, and rapid fabrication make it suitable for advanced temperature monitoring and control.
- This sensor represents a promising candidate for applications requiring precise thermal management.
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