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

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Midwave infrared interband-cascade light-emitting devices (ICLEDs) have the potential to improve the selectivity, stability, and sensitivity of low-cost gas sensors. We demonstrate a broadband direct absorption CH4 sensor with an ICLED coupled to a plastic hollow-core fiber (1 m length, 1500 µm inner diameter). The sensor achieves a 1σ noise equivalent absorption of approximately 0.2 ppmv CH4 at 1 Hz, while operating at a low drive power of 0.5 mW. A low-cost sub-ppmv CH4 sensor would make monitoring emissions more affordable and more accessible for many relevant industries, such as the petroleum, agriculture, and waste industries.

Original languageEnglish (US)
Pages (from-to)7221-7231
Number of pages11
JournalOptics Express
Issue number5
StatePublished - Mar 1 2021

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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