quantum cascade laser

initialism: QCL
https://doi.org/10.1351/goldbook.08664
Laser that emits mid-infrared radiation.
Note:
A QCL can be used as a source for infrared spectroscopy.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 760 (https://doi.org/10.1515/pac-2019-0203)