Coherent light generators – Particular active media – Gas
Patent
1990-10-31
1992-02-18
Scott, Jr., Leon
Coherent light generators
Particular active media
Gas
372 58, 372 34, 372 52, H01S 322
Patent
active
050900200
ABSTRACT:
Apparatus for controlling the composition of a laser gas or gas mixture includes a cryogenic gas-processor (2) connectible to a gas laser (1) selectively to receive gas or a gas mixture therefrom, remove impurities from the gas or gas mixture and selectively return the purified gas or gas mixture to the laser (1). A high temperature gas-purifier (3) is provided in gas flow connection with the processor (2) and with the laser (1) selectively to receive gas or a gas mixture therefrom, remove halogen and/or impurities from the gas or gas mixture and selectively return the dehalogenated or purified gas or gas mixture to the laser (1). Gas analysis means (4) is provided for receiving gas or gas mixture from the laser (1) to analyze it and produce output signals indicative of the actual composition of the laser gas or gas mixture. The output signals are passed to control means (6) operative to compare the actual composition values with desired composition values and operate the processor (2) and/or purifier (3) and/or a clean gas or gas mixture source (5) selectively connectible to the laser (1) to control the laser gas or gas mixture composition.
REFERENCES:
patent: 3605036 (1971-09-01), Barnaby
patent: 4606030 (1986-08-01), Berkowitz et al.
patent: 4674092 (1987-06-01), Cannon
patent: 4723254 (1988-02-01), Turner
British Aerospace Public Limited Company
Jr. Leon Scott
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