Li Nathan, Tao Lei, Yi Hongming, Kim Chul Soo, Kim Mijin, Canedy Chadwick L, Merritt Charles D, Bewley William W, Vurgaftman Igor, Meyer Jerry R, Zondlo Mark A
Opt Express. 2021 Mar 1;29(5):7221-7231. doi: 10.1364/OE.415724.
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 CH 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 CH at 1 Hz, while operating at a low drive power of 0.5 mW. A low-cost sub-ppmv CH sensor would make monitoring emissions more affordable and more accessible for many relevant industries, such as the petroleum, agriculture, and waste industries.
中波红外带间级联发光器件（ICLED）有潜力提高低成本气体传感器的选择性、稳定性和灵敏度。我们展示了一种宽带直接吸收式甲烷传感器，它将一个ICLED与一根塑料空心光纤（长度1米，内径1500微米）耦合。该传感器在1赫兹时实现了约0.2 ppmv甲烷的1σ噪声等效吸收，同时以0.5毫瓦的低驱动功率运行。低成本的亚ppmv级甲烷传感器将使许多相关行业（如石油、农业和废物处理行业）的排放监测更加经济实惠且易于实现。
