Coherent light generators – Particular active media – Gas
Patent
1983-04-13
1987-06-09
Wise, Robert E.
Coherent light generators
Particular active media
Gas
H01S 322, H01S 3223
Patent
active
046726217
ABSTRACT:
In a laser resonator having a gas-introducing portion at one end of a laser tube, where the gas introducing portion comprises an inner tube communicating with the laser tube and an outer tube covering the inner tube. The inner tube has a plurality of circumferentially spaced apart flow passages so that a gas mixture fed from a gas source to an annular chamber defined between the inner surface of the outer tube and the outer surface of the inner tube, is led into the inside of the inner tube via the flow passages. As a result, turbulence occurs within the inner tube so that radial distribution of gas flow speed in the laser tube is made uniform, thereby increasing the maximum output and stability. The flow passages may be slits, oval or circular openings, triangular openings or the like. The flow passages may be skewed relative to both the radial and tangential lines passing therethrough or relative to the axis of the inner tube so that the gas introduced inside the inner tube spirals, and therefore the gas travels along the laser tube with a spiral movement.
REFERENCES:
patent: 4011522 (1977-03-01), Falk
patent: 4074208 (1978-02-01), Mack et al.
patent: 4351052 (1982-09-01), Sasaki et al.
Morita Yasuyuki
Sano Reiji
Takahashi Hidemi
Matsushita Electric - Industrial Co., Ltd.
Wise Robert E.
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