Abstract: A laser discharge tube comprises a discharge envelope and an anode and cathode both disposed within the envelope. The envelope includes a capillary tube having a hole. In this hole the tip portion of the anode is inserted. Outside the envelope there is provided a magnet generating a magnetic field which lies in the vicinity of the anode.

Abstract: A hollow cathode laser comprises a cathode body which constitutes a part of a discharge envelope. The cathode body has a cathode hole coaxial with the body. It further has three anode holes which are through holes extending parallel to the axis of the cathode body and communicating with the cathode hole through slits, respectively. Three cylindrical anodes extend respectively through the anode holes and are spaced by a given distance from the inner surfaces defining the respective anode holes. The anodes have portions which protrude through the respective slits and which are positioned flush with the inner surface defining the cathode hole in the circumferential direction thereof.

Abstract: A gas laser discharge tube comprises a discharge vessel containing a discharge gas, a rod-shaped anode, a corrugated cathode and a voltage source connected between the anode and cathode. The corrugated cathode comprises a metal hollow cylinder arranged coaxially with the optical axis of the laser and a plurality of metal discs arranged coaxially with the optical axis of the laser at regular intervals in the axial direction of the metal hollow cylinder. The discs have their peripheries secured to the inner periphery of the metal hollow cylinder. Each disc has a central hole and another hole through which the anode extends parallel to the optical axis of the laser.

Abstract: A metal vapor laser generating apparatus comprising a laser fine tube having Brewster windows at the ends and containing rare gas, an anode provided near one end of the fine tube, a vessel housing metal which is to be forwarded into the fine tube as vapor and ionized there by discharge, and a branch tube having its one end connected to the fine tube at a point adjacent to the other end of the fine tube. A cathode is provided at the other end of the branch tube and a large number of fine slits are bored through the wall of the branch tube at the central portion thereof, the slitted portion being surrounded by a sealed outer tube loaded with an adsorbent for adsorbing the ionized metal. The size of the slit is adjusted to permit passage of the ionized metal, but not to cause a discharge leakage.