IBSG company in collaboration with the Infrared Optoelectronics Laboratory of Ioffe Physical–Technical Institute has developed a series of high-performance LEDs completely covered the spectral range of 1.6 - 5.0 µm. This mid-infrared spectral range contains the absorption bands of water vapor, carbon dioxide, nitrogen-containing molecules (N2O, NO2, NH3), hydrocarbon molecules (methane) and many other organic and inorganic substances. Mid-Infrared LEDs are perspective sources for developing the portable gas sensors for measurement of concentration of different gases. Another important area of gas sensor application is medicine. Sensitive diagnostics of various diseases can be provided through analyzing a chemical composition of expired air, blood and skin. ◆發光二極體 LEDs (1.8~2.4 μm) 一些重要的化合物，例如：水、甲烷、一氧化碳、丙酮，其特徵吸收光譜落在1.8 ~ 2.4μm，此光源較適合用在環境監控、通訊以及醫療。 ◆發光二極體 LEDs (2.7~4.7 μm) 此光源為氣體傳感器的標準光源，天然氣的特徵吸收光譜落在2.7~4.7μm，其異質接面結構為InAsSb/InAsSbP。
