C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/124, 117/74
C23C 14/24 (2006.01) B05D 3/14 (2006.01) H01S 3/038 (2006.01)
Patent
CA 1320874
- 8 - Abstract Process for the production of laser cathodes The process for the production of laser cathodes by means of a vacuum coating procedure provides for a well controlled slow layer growth with the simultaneous presence of the laser gas at a total pressure of up to 5 x 10-4 mbar. This favours the inclusion of laser gas atoms in the cath- ode layer already before the operation of the laser. With- out interrupting the vacuum, the coated cathode is then moved into a second position and laser gas is introduced under slight pressure against the cathode coating (4) by means of a nozzle (7). At the same time, a number of dis- charge cycles are initiated via the electrically conduc- tive base (2) for the cathode basic element (1) and an electrode (8) arranged concentrically with respect to the nozzle (7), having the effect of premature sputtering-off causing a levelling of the current density and a further inclusion of inert gas atoms in the Al coating (4). Fur- thermore, after a number of discharge cycles, a small amount of oxygen may be added, so that an Al2O3 passiva- tion layer is formed still before flooding of the recipient. The process substantially increases the operating reliability and long-term stability of laser amplifiers and laser oscillators. (Fig. 2)
549631
Kirby Eades Gale Baker
Litef Gmbh
Litton Systems Inc.
Tschanun Wolfgang
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