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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
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Optical fiber temperature sensor based on a Mach-Zehnder interferometer with single-mode-thin-core-single-mode fiber
Qingzhuo Wang1, Hongyun Meng1, Xiaofeng Fan1
1Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.
The Review of Scientific Instruments
|February 5, 2020
Summary
This study introduces a novel fiber optic temperature sensor using a Mach-Zehnder interferometer. The sensor demonstrates high sensitivity and a linear response for accurate temperature measurement.
Area of Science:
- Optoelectronics
- Fiber Optics
- Sensor Technology
Background:
- Accurate temperature monitoring is crucial in various scientific and industrial applications.
- Traditional sensors may face limitations in harsh environments or specific measurement needs.
Purpose of the Study:
- To propose and experimentally demonstrate a novel fiber optic temperature sensor.
- To evaluate the sensor's performance, including sensitivity and linearity.
Main Methods:
- Fabrication of a Mach-Zehnder interferometer using single-mode fiber (SMF) and thin core fiber.
- Heating and stretching welding areas to optimize light splitting and recombination.
- Analyzing the shift in resonant dip wavelength with temperature variations.
Main Results:
- Achieved a high temperature sensitivity of 65 pm/°C.
- Demonstrated a strong linear correlation (R² = 0.996) within the 25 °C to 80 °C range.
- The wavelength shift is attributed to thermo-optic and thermal expansion effects.
Conclusions:
- The developed fiber optic temperature sensor offers high sensitivity and linearity.
- Its ease of manufacture and low cost make it suitable for diverse temperature measurement applications.
