Phys.org  June 3, 2019 Researchers in Germany working under the EU project CHEQUERS www.chequers.eu combined very fast widely tunable quantum cascade lasers with adjusted transmission and receiver optics, fast IR detectors and a fitting control and detection software. The miniaturized quantum cascade laser with an external resonator can scan the whole spectral range of the QC laser chip within just a millisecond. The measuring principle is based on selective spectral lighting of the target in the wavelength range of 1000—1300 cm-1. The chemical substance is identified based on the intensity of the backscattered light and the illumination wavelength. The spectral […]