Related Experiment Video
Updated: Mar 21, 2026
09:48
Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
12.5K
Phase-shift detection in a Fourier-transform method for temperature sensing using a tapered fiber microknot resonator
Optics Letters
|May 19, 2016
Summary
This study demonstrates a novel temperature sensing technique using a fiber microknot resonator. The method achieves significantly higher temperature sensitivity compared to traditional interferometers.
Area of Science:
- Optoelectronics
- Fiber Optics
- Optical Sensors
Background:
- Optical resonators are crucial for sensing applications.
- Tapered fiber microknot resonators offer unique optical properties.
- Accurate phase-shift detection is vital for high-sensitivity measurements.
Purpose of the Study:
- To propose and demonstrate a phase-shift detection technique for temperature sensing.
- To utilize a fast-Fourier-transform (FFT)-based spectrum analysis for this purpose.
- To investigate the temperature sensitivity of a tapered fiber microknot resonator.
Main Methods:
- Employing a tapered fiber microknot resonator.
- Utilizing fast-Fourier-transform (FFT) spectrum analysis for phase-shift detection.
- Characterizing temperature-induced phase shifts of multiple optical modes.
Main Results:
- Identified multiple transmission peaks in the FFT spectrum corresponding to different optical modes.
- Observed distinct temperature sensitivities for different sets of peaks.
- Achieved temperature sensitivities up to -0.542 rad/°C, approximately 10 times higher than conventional Mach-Zehnder interferometers.
Conclusions:
- The proposed FFT-based phase-shift detection technique is effective for temperature sensing.
- Tapered fiber microknot resonators exhibit enhanced temperature sensitivity.
- This method offers a promising alternative for high-precision temperature monitoring.
