Gas laser oscillator having a gas flow smoothing device to smooth gas flow in the electrical discharge region
Patent
·
OSTI ID:6707338
An axial flow type gas laser oscillator is described comprising: an electrical discharge tube having an inlet having an outer circumference and an annular gap for introducing a gas flow to the inside thereof, and an outlet; a pair of electrodes, installed along the longitudinal length of the electrical discharge tube with predetermined separation length, for producing an electric discharge inside the gas flow supplied to the electrical discharge tube; an optical cavity defined by a pair of mirrors and extending through the inside of the electrical discharge tube; a heat exchanger for cooling the gas flow which is heated by the electric discharge produced between the pair of electrodes, the heat exchanger having an inlet and an outlet; a first connecting tube, connecting the outlet of the electrical discharge tube with the inlet of the heat exchanger, for guiding the heated gas flow to the heat exchanger; a second connecting tube, connecting the outlet of the heat exchanger with the inlet of the electrical discharge tube, for guiding the cooled gas flow to the electrical discharge tube; a flow control unit provided at the inlet of the electrical discharge tube, the flow control unit comprising: (a) a flow control valve, slidably fitted around the outer circumference of the electrical discharge tube where the annular gap is formed, for changing the size of the annular gap, the flow control valve also having an outer circumference; and (b) a gas flow smoothing device, provided around the outer circumference of the flow control valve, for covering the annular gap and smoothing the gas flow flowing into the electrical discharge tube through the annular gap.
- Assignee:
- Amada Engineering and Service Co., Inc., La Mirada, CA
- Patent Number(s):
- US 4771436
- OSTI ID:
- 6707338
- Country of Publication:
- United States
- Language:
- English
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