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Methane detection using an interband-cascade LED coupled to a hollow-core fiber
Optics Express
|March 17, 2021
Summary
We developed a low-cost methane (CH4) sensor using interband-cascade light-emitting devices (ICLEDs). This sensor offers high sensitivity for improved emissions monitoring in industries like petroleum and agriculture.
Area of Science:
- Optoelectronics
- Gas Sensing Technology
- Environmental Monitoring
Background:
- Interband-cascade light-emitting devices (ICLEDs) offer potential for enhanced gas sensing.
- Current gas sensors can be limited in selectivity, stability, and sensitivity.
- Cost-effective methane monitoring is crucial for various industries.
Purpose of the Study:
- To demonstrate a novel, low-cost methane (CH4) sensor.
- To leverage ICLEDs for improved gas detection performance.
- To assess the sensor's suitability for industrial emissions monitoring.
Main Methods:
- Utilized a midwave infrared interband-cascade light-emitting device (ICLED).
- Coupled the ICLED to a 1-meter plastic hollow-core fiber (1500 µm inner diameter).
- Employed broadband direct absorption spectroscopy for CH4 detection.
Main Results:
- Achieved a 1σ noise equivalent absorption of approximately 0.2 ppmv CH4 at 1 Hz.
- Operated the sensor at a low drive power of 0.5 mW.
- Demonstrated the sensor's capability for sensitive methane detection.
Conclusions:
- The developed ICLED-based sensor shows promise for low-cost, high-sensitivity methane detection.
- This technology can significantly improve the affordability and accessibility of emissions monitoring.
- Potential applications include the petroleum, agriculture, and waste management industries.
