From Glossary of Meteorology
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Solid-state laser in which lasing is achieved by passing an injection current through the active region of a semiconductor across the p–n junction.
Operating in the infrared spectral region, 2.7–30 μm, makes diode lasers particularly useful for the measurement of certain atmospheric trace gases such as nitrous oxide, carbon monoxide, or formaldehyde.
Reid, J., J. Shewchun, B. K. Garside, and E. A. Ballik 1978. High sensitivity pollution detection employing tunable diode lasers. Appl. Optics. 17. 300–307.