Metal ion laser protected against the deposition of metal vapor

Details Metal ion laser protected against the deposition of metal vapor Metal ion laser protected against the deposition of metal vapor

1986-06-06

1987-12-01

Scott, Jr., Leon

Coherent light generators

Particular active media

Gas

372 61, 372 85, 372 33, 372 88, H01S 322

Patent

active

047109386

ABSTRACT:
A helium-cadmium ion laser is disclosed which has a tubular housing hermetically closed at both ends by Brewster windows and having a hollow cathode mounted therein. Disposed outside the hollow cathode and open to its interior are a row of primary anodes and a row of metal chambers containing a metal material to be vaporized. A pair of secondary anodes are further disposed adjacent the opposite ends of the hollow cathode for protecting the Brewster windows from contamination by the metal vapor by sending it back into the hollow cathode. In order to prevent the metal vapor from depositing on the ends of the hollow cathode on being thus sent back, a pair of tubular insulators are coaxially mounted next to the opposite ends of the hollow cathode for the passage of the metal vapor therethrough. Each tubular insulator has a bore including a smaller diameter portion away from the hollow cathode, and a larger diameter portion closer to the hollow cathode. Further, for impeding the flow of the metal vapor from the hollow cathode toward the Brewster windows, the laser housing has a pair of constrictions adjacent the Brewster windows.

REFERENCES:
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patent: 4105954 (1978-08-01), Wang et al.
patent: 4193042 (1980-03-01), Wang
patent: 4210876 (1980-07-01), Ogata
patent: 4257014 (1981-02-01), Hattori et al.
patent: 4287484 (1981-09-01), Wang et al.
patent: 4425651 (1984-01-01), Popp et al.

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