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Updated: Jun 22, 2025
Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
High-Resolution and Large-Dynamic Range Fiber-Optic Sensors Based on Dual-Mode Direct Spectrum Interrogation Method
Min Zhou1,2, Zhe Zhang1, Qingyue Cui1
1Shenzhen Key Laboratory of Ultra-Intense Laser and Advanced Material Technology, Center for Intense Laser Application Technology, and College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China.
This study introduces a novel optical fiber sensor using a Fabry-Perot Interferometer (FPI) to overcome limitations in temperature and strain measurement resolution and dynamic range. The new method achieves high resolution for both temperature and strain sensing applications.
Area of Science:
- Photonics and Optical Sensing
- Materials Science and Engineering
Background:
- Conventional fiber optic sensors face trade-offs between resolution and dynamic range.
- Existing methods struggle to simultaneously achieve high precision and broad measurement capacity.
Purpose of the Study:
- To develop a novel fiber optic sensing method that resolves the conflict between resolution and dynamic range.
- To demonstrate a sensor capable of high-resolution temperature and strain measurements.
Main Methods:
- Utilized a Fabry-Perot Interferometer (FPI) sensor constructed with chirped fiber Bragg gratings (CFBG).
- Employed a dual-mode direct spectrum interrogation technique for precise measurement.
- Validated the sensor's performance through proof-of-concept experiments.
Main Results:
- Achieved a temperature resolution of 0.2 °C over a 30-130 °C range.
- Demonstrated a strain resolution of 10 µε within a 0-1000 µε range.
- Indicated potential for further resolution improvement and mass production.
Conclusions:
- The proposed sensing schema effectively overcomes the resolution-dynamic range compromise in fiber-optic sensors.
- This approach offers a versatile platform for various sensing applications beyond temperature and strain.
- The method is scalable and suitable for mass production, enhancing practical utility.
