Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1987-11-10
1989-03-07
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 58, 372 88, H01S 303
Patent
active
048102229
ABSTRACT:
A process for producing a laser cathode by vacuum coating provides well-controlled, slow layer growth in the presence of the laser gas at a total pressure of up to 5.times.10.sup.-4 mbar. Such process includes laser gas atoms in the cathode layer. Without interruption of the vacuum, the coated cathode is moved into a (second) position and laser gas is introduced under slight pressue against the cathode coating by means of a nozzle. At the same time, a number of discharge cycles are initiated via the electrically conductive base of the cathode basic element and an electrode, arranged concentrically with respect to the nozzle, having the effect of premature sputtering-off to cause a levelling of the current density and a further inclusion of inert gas atoms in the Al coating. After a number of discharge cycles, a small amount of oxygen may be added to form an Al.sub.2 O.sub.3 passivation layer before flooding of the recipient. The process substantially increases the operating reliability and long-term stability of laser amplifiers and oscillators.
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Kramsky Elliott N.
Litef GmbH
Ramsey Kenneth J.
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