Gas laser system

• US 4,207,540 A
• Filed: 02/09/1978
• Issued: 06/10/1980
• Est. Priority Date: 02/10/1977
• Status: Expired due to Term

• Current Assignee: Stichting voor Fundamenteel Onderzoek der Materie
• Original Assignee: Stichting voor Fundamenteel Onderzoek der Materie
• Inventors: Ernst, Gerardus J.
• Primary Examiner(s): Davie, James W.
• Application Number:
  US05/876,498
• Time in Patent Office: 852 Days
• Field of Search: 331/94.5 G, 331/94.5 PE, 331/94.5 D
• US Class Current: 372/38.05
• CPC Class Codes: H01S 3/038 Electrodes, e.g. special shape, configuration or composition
• CPC Class Codes: H01S 3/0971 transversely excited H01S3/0975 takes precedence

Abstract

A gas laser system having a laser tube with two parallel rectangular flat electrodes, and a metal plate positioned between the parallel edges of the electrodes coupled to an electronic circuit for inducing the ionization of the gas in the gas laser tube preceding the discharge of the gas.

Claims

1. A gas laser system comprising a laser tube with two rectangular substantially flat electrodes positioned opposite one another and parallel to the axis of the tube for producing a substantially uniform field, a direct current source with a buffer capacitor connected in parallel therewith, one terminal of said current source being connected to the first of said electrodes, and means for inducing the ionization of the gas preceding the discharge in the gas mixture, said means comprising at least one metal plate connected to the other terminal of the source of current and being insulated at the side of the discharge and being positioned in parallel to the axis between parallel running edges of the electrodes, a series connection of an impedance and an inductor mutually connecting the electrodes, said inductor connectd to said second electrode, a switch which may temporarily connect the junction of the impedance and the inductor to the metal plate, and a capacitor connected between the second electrode and the metal plate.

2. A laser system according to claim 1 in which the electrode profiles are uniform field electrode profiles.

3. A laser system according to either of claim 1 or 2 in which the electrodes are polished.

4. A laser system according to either of claim 1 or 2 in which a glass plate is positioned on the metal plate as insulation.

5. A laser system according to either of claim 1 or 2 in which said switch is a spark gap.

6. A laser system according to either of claim 1 or 2 in which the value of the inductor is more than 50 nH.