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Temperature Sensor Based on Side-Polished Fiber SPR Device Coated with Polymer
Shuhui Liu1, Shaoqing Cao2, Zhe Zhang3
1Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China. liushuhui@szu.edu.cn.
Sensors (Basel, Switzerland)
|September 25, 2019
Summary
A new optical fiber sensor uses surface plasmon resonance (SPR) for highly sensitive temperature measurements. This cost-effective device shows potential for biomedical and environmental applications.
Area of Science:
- Optoelectronics
- Nanotechnology
- Sensor Technology
Background:
- Surface Plasmon Resonance (SPR) is a label-free optical sensing technique.
- Optical fiber sensors offer remote and multiplexed sensing capabilities.
- Accurate temperature monitoring is crucial in biomedical and environmental fields.
Purpose of the Study:
- To demonstrate a highly sensitive temperature sensor based on SPR in a side-polished single mode fiber.
- To investigate the sensor's performance characteristics, including refractive index and temperature sensitivity.
Main Methods:
- Fabrication of an SPR sensor by coating a side-polished single mode fiber with a gold film.
- Application of a UV-curable adhesive layer onto the gold film.
- Characterization of the sensor's response to changes in refractive index and temperature.
Main Results:
- The gold-coated fiber exhibited high refractive index sensitivity (1691.6–8800 nm/RIU).
- The resonant wavelength shifted upon adhesive coating and curing.
- Achieved a notable temperature sensitivity of -0.978 nm/°C within the 25 °C to 100 °C range.
Conclusions:
- The developed optical fiber SPR sensor is simple, cost-effective, and highly sensitive.
- The sensor demonstrates significant potential for accurate temperature measurements in various industries.
- The sensor's performance is attributed to the thermo-optic and thermal expansion properties of the adhesive layer.
