Amplifiers – Parametric amplifiers – Semiconductor type
Patent
1980-02-07
1982-05-04
Moskowitz, Nelson
Amplifiers
Parametric amplifiers
Semiconductor type
372 56, 372 58, 372 82, H01S 305, H01S 3097
Patent
active
043284647
ABSTRACT:
A high power metallic halide laser capable of providing 300 watts of output power. More specifically, a laser amplification system is disclosed whereby a metallic halide vapor such as copper chloride (Cu.sub.3 Cl.sub.3) is caused to flow through a laser amplifier (10) and a heat exchanger means (24) in a closed loop system whereby the flow rate is altered to control the temperature rise across the length of the laser amplifier. In the copper chloride laser described in an exemplary embodiment, the copper atoms within the laser amplifier should not exceed a temperature of 3000.degree. K. so that the number of copper atoms in the metastable state will not be high enough to prevent amplification in the amplifier. In addition, a molecular dissociation apparatus (20) is provided at the input to the laser amplifier for dissociating the copper chloride into copper atoms and ions and chlorine atoms and ions. The dissociation apparatus includes a hollow cathode tube (56) and an annular ring (60) spaced apart from the tube end (62). A voltage differential is applied between the annular ring and the hollow cathode tube so that as the copper chloride flows therethrough, it is dissociated into copper and chlorine ions and atoms.
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Cross et al., "Cataphoretic . . . Metal Halide-He Discharges", 6/76, pp. 2395-2401, Jour. Appl. Phys., vol. 47, #6.
Pivirotto, "Potentially High-Power Copper Halide Laser", 2/9/78, Paper at OSA/IEEE Conf. on Laser and Electrooptical Systems, p. 74.
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Frosch Robert A. Administrator of the National Aeronautics and Space
Pivirotto Thomas J.
Manning John R.
McCaul Paul F.
Moskowitz Nelson
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