Apparatus for generating coherent infrared energy of selected wa

Details Apparatus for generating coherent infrared energy of selected wa Apparatus for generating coherent infrared energy of selected wa

1983-02-01

1985-03-12

Sikes, William L.

Coherent light generators

Particular active media

Gas

372 58, H01S 300

Patent

active

045049530

ABSTRACT:
A tunable source (11) of coherent infrared energy includes a heat pipe (12) having an intermediate region (24) at which cesium (22) is heated to vaporizing temperature and end regions (27, 28) at which the vapor is condensed and returned to the intermediate region (24) for reheating and recirculation. Optical pumping light (43) is directed along the axis of the heat pipe (12) through a first end window (17) to stimulate emission of coherent infrared energy which is transmitted out through an opposite end window (18). A porous walled tubulation (44) extends along the axis of the heat pipe (12) and defines a region (46) in which cesium vapor is further heated to a temperature sufficient to dissociate cesium dimers which would decrease efficiency by absorbing pump light (43). Efficient generation of any desired infrared wavelength is realized by varying the wavelength of the pump light (43).

REFERENCES:
"Stimulated Electronic Raman Scattering in Cs Vapor . . . " Optical & Quam Electronics, vol. 9, pp. 509-518 (1977).

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