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Optical Fiber Temperature and Humidity Dual Parameter Sensing Based on Fiber Bragg Gratings and Porous Film
Jiankun Peng1, Jianren Zhou1, Chengli Sun1
1School of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China.
Sensors (Basel, Switzerland)
|September 9, 2023
Summary
A novel optical fiber sensor utilizes a porous anodic alumina film for simultaneous temperature and humidity detection. This sensor demonstrates high sensitivity for both environmental parameters, offering a promising solution for sensing applications.
Area of Science:
- Materials Science
- Optical Engineering
- Sensor Technology
Background:
- Accurate and simultaneous measurement of temperature and humidity is crucial for various environmental monitoring applications.
- Existing sensors often face limitations in sensitivity, selectivity, or integration complexity.
Purpose of the Study:
- To propose and fabricate a novel optical fiber sensor for simultaneous temperature and humidity detection.
- To investigate the performance and sensitivity of the proposed sensor.
Main Methods:
- Fabrication of a porous anodic alumina film using an anodic oxidation reaction.
- Integration of the porous film with a fiber Bragg grating (FBG) for sensing.
- Experimental characterization of the sensor's response to temperature and humidity variations.
Main Results:
- The porous anodic alumina film exhibited suitable properties for humidity detection due to its porous structure.
- The sensor demonstrated a temperature sensitivity of 10.4 pm/°C.
- The sensor achieved a humidity sensitivity of 185 pm/%RH.
Conclusions:
- The proposed optical fiber sensor, incorporating a porous anodic alumina film, is effective for simultaneous temperature and humidity sensing.
- The sensor exhibits high sensitivity, making it a viable option for environmental monitoring.
