Diode laser

diode laser

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.

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A space weather term to describe a localized, transient volume of the solar atmosphere in which plage, sunspots, faculae, solar flares, etc., may be observed. Active regions are the result of enhanced magnetic fields; they can have bipolar or multi-polar magnetic fields, and can be ephemeral to long-lived in nature.