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Photonics Dictionary

gas laser

One of the first lasers to find practical application. Generally, the pumping mechanism is an electric discharge, although some high-power forms employ chemical reaction or gas compression and expansion to form population inversion. Vibrational energy level transitions give emission from the near-infrared to far-infrared, and vibrational rotational transitions give emission from the far-infrared to microwave wavelengths. The helium-neon, argon-ion and carbon dioxide lasers are examples of gas lasers.
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