Related Experiment Video
Updated: Mar 26, 2026
12:47
Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
Published on: May 2, 2014
22.2K
Fiber optic hydrogen sensor based on an etched Bragg grating coated with palladium
Applied Optics
|February 3, 2016
Summary
This study presents a novel fiber Bragg grating sensor coated with palladium for hydrogen detection. A Teflon tape solution enhances sensor stability in humid conditions, achieving high sensitivity.
Area of Science:
- Materials Science
- Chemical Engineering
- Optical Sensors
Background:
- Hydrogen (H2) detection is critical for safety and industrial processes.
- Fiber Bragg gratings (FBGs) offer potential for optical sensing applications.
- Palladium (Pd) is a known material for hydrogen interaction.
Purpose of the Study:
- To develop and characterize an FBG-based sensor for H2 detection.
- To investigate the effect of palladium coating thickness on sensor performance.
- To address the instability of palladium hydride in humid environments.
Main Methods:
- Chemical etching to reduce FBG cladding diameter to 50 μm.
- Coating one FBG with 150 nm of palladium.
- Utilizing Teflon tape to mitigate humidity effects.
- Characterizing sensor response to H2 concentrations (0-1% v/v) in nitrogen at room temperature and atmospheric pressure.
Main Results:
- The sensor demonstrated sensitivity exceeding 20 pm/% v/v for H2 detection.
- Palladium hydride exhibited unstable behavior in high humidity.
- Teflon tape effectively stabilized the sensor in humid conditions.
- Optimized Pd coating thickness ranged from 50 to 200 nm.
Conclusions:
- The developed FBG-based palladium sensor is effective for H2 detection.
- The proposed Teflon tape solution enhances sensor reliability in varying humidity.
- The sensor shows promise for practical H2 sensing applications.
