Claims
- 1. A laser apparatus comprising: means defining a discharge space having a doughnut-like annular section comprising an outer pipe and an inner pipe coaxially disposed, an inner periphery of said outer pipe and an outer periphery of said inner pipe being utilized as waveguide paths for a laser beam that is output by said discharge space in a direction intersecting perpendicularly to said annular section; and
- two or more electrodes for applying an alternating voltage disposed in the outer periphery of said outer pipe,
- wherein said outer pipe is formed from a dielectric.
- 2. A laser apparatus comprising: means defining a discharge space having a doughnut-like annular section comprising an outer pipe and an inner pipe coaxially disposed, an inner periphery of said outer pipe and an outer periphery of said inner pipe being utilized as waveguide paths for a laser beam that is output by said discharge space in a direction intersecting perpendicularly to said annular section; and
- two or more electrodes for applying an alternating voltage juxtaposed in the direction of outputting a laser beam in the outer periphery of said outer pipe,
- wherein said outer pipe is formed from a dielectric.
- 3. A laser apparatus according to claim 1 or 2, wherein said inner pipe is formed from a conductor.
- 4. A laser apparatus according to claim 1 or 2, wherein said inner pipe is formed from a dielectric.
- 5. A laser apparatus according to claim 1 or 2, wherein said inner pipe is constituted by coating a dielectric layer on the outer periphery of a tubular body formed from a conductor.
- 6. A laser apparatus according to claim 5, wherein said tubular body is grounded.
- 7. A laser apparatus according to claim 1 or 2, further comprising, in the outer periphery of said outer pipe, electrically floated conductive members alternately disposed with said electrodes for applying a voltage, said electrodes and said conductive members being cooled.
- 8. A laser apparatus according to either of claims 1 to 2, wherein the inner pipe is cooled.
- 9. A laser apparatus according to either of claims 1 or 2, further comprising a polyphase alternating power source having more than three phases.
- 10. A laser apparatus according to either of claims 1 or 2, wherein said electrodes are adjacent to each other, and alternating voltages different in phase are applied to said electrodes.
- 11. A laser apparatus according to claim 10, further comprising an electrically floated or grounded cooling pipe disposed between electrodes adjacent to each other.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-009076 |
Jan 1992 |
JPX |
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4-307858 |
Oct 1992 |
JPX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/007/231, filed Jan. 21, 1993 now U.S. Pat. No. 5,373,528.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0392485 |
Oct 1990 |
DEX |
Non-Patent Literature Citations (1)
Entry |
R. Nowack et al., "High Power CO.sub.2 Waveguide Laser of the 1 kW Category", SPIE Proceedings, vol. 1276, Mar. 1990, pp. 18 and 19. |
Divisions (1)
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Number |
Date |
Country |
Parent |
7231 |
Jan 1993 |
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