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5 March 2021 Methane detection using an interband cascade LED coupled to a hollow-core fiber
Nathan Li, Lei Tao, Hongming Yi, Chul Soo Kim, Mijin Kim, Chadwick L. Canedy, Charles D. Merritt, William W. Bewley, Igor Vurgaftman, Jerry R. Meyer, Mark A. Zondlo
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Proceedings Volume 11706, Light-Emitting Devices, Materials, and Applications XXV; 117060T (2021) https://doi.org/10.1117/12.2577984
Event: SPIE OPTO, 2021, Online Only
Abstract
Mid-infrared, interband-cascade, light-emitting devices (ICLEDs) have the potential to improve the performance of trace-gas sensors for air quality and greenhouse gas measurements. ICLEDs are broadband, incoherent, high-optical-power devices (up to ~5 mW continuous-wave at room temperature). We present an ICLED-based, methane sensor using a hollow-core fiber and direct absorption spectroscopy. A 1σ noise equivalent absorption of 0.17 ppmv CH4 at 1 Hz was achieved (1.13e-5 absorbance). Sub-ppmv methane detection is relevant for monitoring emissions near sources such as petrochemical infrastructure, agricultural activities, and wastewater treatment plants.
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Nathan Li, Lei Tao, Hongming Yi, Chul Soo Kim, Mijin Kim, Chadwick L. Canedy, Charles D. Merritt, William W. Bewley, Igor Vurgaftman, Jerry R. Meyer, and Mark A. Zondlo "Methane detection using an interband cascade LED coupled to a hollow-core fiber", Proc. SPIE 11706, Light-Emitting Devices, Materials, and Applications XXV, 117060T (5 March 2021); https://doi.org/10.1117/12.2577984
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KEYWORDS
Light emitting diodes
Methane
Nitrogen
Photovoltaic detectors
Calibration
Fiber couplers
Light sources
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