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US 4,393,506 AGranted
Sealed-off RF excited CO.sub.2 lasers and method of manufacturing such lasers
AssigneeWalwel, Inc.
InventorsPeter Laakmann, Katherine D. Laakmann
Life of this patent
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AssigneeWalwel, Inc.
InventorsPeter Laakmann, Katherine D. Laakmann
Estimating the term…
A method is disclosed for manufacturing a sealed-off RF excited CO.sub.2 laser with a longer operating life. The invention, which relates to the method and the resulting laser, comprises means for stabilizing the laser gas chemistry otherwise affected by CO.sub.2 dissociation, O.sub.2 consumption, and outgassing of H.sub.2 and H.sub.2 O. More specifically, the aluminum housing of the laser assembly is nickel-plated and then passivated by an oxidation technique using concentrated nitric acid. In addition, novel gettering substances, comprising either a group B metal or cellulose, are employed to adsorb hydrogen and/or water vapor to alleviate the outgassing problem.
A method of constructing a sealed-off RF excited CO.sub.2 waveguide laser comprising the steps of:
A method of constructing a sealed-off RF excited CO.sub.2 waveguide laser comprising the steps of:
A method of constructing a sealed-off RF excited CO.sub.2 waveguide laser comprising the steps of:
A sealed-off RF excited CO.sub.2 waveguide laser including a gettering substance in contact with the gas mixture contained within said laser, said substance having high sorbitivity to hydrogen gas at room temperature and decreasing sorbitivity to hydrogen gas with increasing temperature, further comprising a housing consisting of nickel-plated aluminum members, the surfaces thereof being passivated with a nickel oxide coating.
In an assembled sealed-off RF excited CO.sub.2 waveguide laser of the type having a gas mixture contained within said laser the improvement comprising cellulose contained within said assembled laser in contact with the gas mixture, said cellulose specially prepared to ensure high sorbitivity to water vapor at room temperature and decreasing sorbitivity to water vapor with increasing temperature to absorb water vapor evolved by the gas mixture.
A sealed-off RF excited CO.sub.2 waveguide laser including a gettering substance in contact with the gas mixture, said gettering substance having high sorbitivity to water vapor at room temperature and decreasing sorbitivity to water vapor with increasing temperature, further comprising a housing of nickel-plated aluminum members, the surfaces thereof being passivated with a nickel oxide coating.
Dependencies are inferred from the claim text.