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Effect of nonradiative transitions on the EDF-based fiber-optic temperature sensor
Applied Optics
|August 12, 2025
Summary
This study investigates erbium-doped fiber (EDF) temperature sensors, revealing how nonradiative transitions affect sensitivity. A novel method using dual EDF fluorescence lifetime differentiation enhances sensor performance.
Area of Science:
- Optoelectronics
- Fiber Optics
- Temperature Sensing
Background:
- Erbium-doped fibers (EDFs) are used in fiber-optic temperature sensors.
- Nonradiative transitions can significantly influence sensor performance and sensitivity.
- Understanding these mechanisms is crucial for improving sensor accuracy.
Purpose of the Study:
- To experimentally investigate the response mechanisms of EDF-based fiber-optic temperature sensors.
- To analyze the influence of nonradiative transitions on sensor sensitivity.
- To propose and validate a sensitivity enhancement technology.
Main Methods:
- Theoretical analysis of fluorescence temperature sensing and nonradiative transition effects.
- Experimental variation of EDF length to study fluorescence lifetime changes.
- Development of a dual EDF fluorescence lifetime differentiation technique.
Main Results:
- Nonradiative transitions cause non-monotonic changes in EDF fluorescence lifetime.
- Sensor sensitivity varies significantly (-0.00070 to 0.00054 ms/°C) with EDF length.
- The proposed dual EDF method achieved a 2°C error and -0.00135 ms/°C sensitivity.
Conclusions:
- Nonradiative transitions critically impact EDF fluorescence lifetime and sensor sensitivity.
- The dual EDF lifetime differentiation method effectively enhances sensor sensitivity and accuracy.
- This research contributes to the advancement of high-performance EDF-based fiber-optic temperature sensors.
