H - Electricity – 01 – S
Patent
H - Electricity
01
S
H01S 3/032 (2006.01) H01S 3/03 (2006.01) H01S 3/036 (2006.01) H01S 3/038 (2006.01)
Patent
CA 2062265
A gas laser oscillating unit comprises a discharge tube 1 for generating an electric discharge to act as a laser excitation source for laser gas flowing from a metal cathode to a metal anode located at opposite ends of the discharge tube. A tube member having a pair of slits 21 generates a swirl of laser gas upstream of the cathode 2. A hollow member with a tapered inner surface squeezes the laser gas stream, the cathode being connected to the tube member 22 through the tapered hollow member 23. At least the inner surface of each of the tube member 22 and the hollow member 23 is made of an alloy material containing aluminum and has thereon a black alumite layer for absorbing diffused laser beams, the black alumite layer 31 being made from an inorganic material. The arrangement better maintains the output of the laser by reducing contamination of the cathode and mirrors.
Hongu Hitoshi
Iwasaki Yutaka
Kirby Eades Gale Baker
Matsushita Electric Industrial Co. Ltd.
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