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Simple method for microwave photonic temperature interrogation with high resolution and sensitivity.
Optics Letters
|September 15, 2022
Summary
We developed a simple microwave photonic system for precise temperature sensing. This novel approach maps temperature to time intervals, achieving high sensitivity and resolution for practical applications.
Area of Science:
- Photonics
- Metrology
- Optical Sensing
Background:
- Accurate temperature measurement is crucial in various scientific and industrial fields.
- Existing methods often involve complex setups or processing.
- There is a need for high-resolution, sensitive, and simple temperature interrogation systems.
Purpose of the Study:
- To propose and demonstrate a novel microwave photonic temperature interrogation system.
- To achieve high resolution and sensitivity using a simple structure.
- To enable temperature measurement through temperature-to-time mapping.
Main Methods:
- Construction of a bidirectional chirped optical signal.
- Utilizing a Fabry-Perot filter to map temperature information to time interval changes of output pulses.
- Employing a low-speed oscilloscope for time interval extraction, avoiding complex processing.
Main Results:
- Achieved a high temperature interrogation sensitivity of 18.24 µs/°C.
- Demonstrated a high resolution of 0.035°C.
- The system requires only a low-speed oscilloscope, simplifying the setup.
Conclusions:
- The proposed microwave photonic system offers a simple yet effective method for temperature interrogation.
- The demonstrated high sensitivity and resolution show significant potential for practical applications.
- The temperature-to-time mapping technique simplifies data acquisition and processing.
