Tachikawa M, Evenson KM. Sequential optical pumping of a far-infrared ammonia laser.
OPTICS LETTERS 1996;
21:1247-1249. [PMID:
19876314 DOI:
10.1364/ol.21.001247]
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Abstract
We present a novel technique for resonantly pumping a continuous-wave far-infrared NH(3) laser with a linetunable mid-infrared NH(3) laser that is optically pumped by a CO(2) laser. In this two-step process we first convert 10-microm CO(2) laser photons into 11-13-microm NH(3) laser photons, which are then converted into 60-400-microm photons in a far-infrared NH(3) laser. Continuous-wave laser action on 10 far-infrared lines of (15)NH(3), including four new ones, has been obtained with a single CO(2) laser pump line.
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