Pulse power supply circuit
    1.
    发明授权
    Pulse power supply circuit 失效
    脉冲电源电路

    公开(公告)号:US5054029A

    公开(公告)日:1991-10-01

    申请号:US464213

    申请日:1990-01-12

    IPC分类号: H01S3/097 H03K3/55

    CPC分类号: H01S3/097

    摘要: In a pulse power supply circuit, first and second charging capacitors are connected in series with a discharge device. First and second gas-filled control switching elements, connected in parallel with each other, are respectively connected in series with the first and second charging capacitors. First and second pulse power sources are respectively connected in parallel with the first and second control switching elements and also respectively connected in series with the first and second charging capacitors so as to charge the capacitors alternately. A control circuit controls the first and second control switching elements so that the switching elements alternately and repeatedly at substantially equal time intervals.

    Metal vapor laser apparatus
    2.
    发明授权
    Metal vapor laser apparatus 失效
    金属蒸气激光装置

    公开(公告)号:US5117434A

    公开(公告)日:1992-05-26

    申请号:US641585

    申请日:1991-01-15

    IPC分类号: H01S3/038 H01S3/03 H01S3/041

    CPC分类号: H01S3/041 H01S3/031

    摘要: A metal vapor laser has a discharge tube with electrodes at opposite ends. A power source is electronically connected to the electrodes and generates a discharge in a discharge region within the discharge tube. The discharge generates laser light which emerges from the tube via windows. In order to cool the apparatus, the discharge tube is surrounded by a cooling jacket in the form of a hollow cooling vessel. A liquid flows in the cooling vessel and removes heat. The space between the cooling vessel and the discharge tube is evacuated. The cooling vessel is conductive and, since it is connected between one of the electrodes and the power supply, its inner and outer walls provide two potential paths for return current. The fact that the inner and outer walls have different diameters means that the inductance of the return paths is large. Therefore, the outer wall has a gap in it filled with insulating material. This forms a break in the conductive path from the electrode to the power source through the outer wall, and so reduces the inductance of the return path. Other geometries are also possible in which all but the innermost path are broken by insulating material.

    Metallic vapor laser apparatus
    3.
    发明授权
    Metallic vapor laser apparatus 失效
    金属蒸气激光装置

    公开(公告)号:US4991180A

    公开(公告)日:1991-02-05

    申请号:US525344

    申请日:1990-05-18

    IPC分类号: H01S3/03 H01S3/036

    CPC分类号: H01S3/031 H01S3/036 H01S3/227

    摘要: A metallic vapor laser apparatus includes a cylindrical discharge tube (31) having an internal space (2), a heat-insulating material (6) encompassing the periphery of the discharge tube (31), and two electrodes (3a) and (3b) having a cylindrical portion coaxial with the discharge tube (31) and disposed at both ends of the discharge tube (31). The internal space (2) are filled with a gas containing the vapor of copper as a laser medium for effecting laser oscillation by the excitation of the filler gas and the discharge. A gas inlet (40) from introducing a buffer gas (G) into the inside is formed at one of the outside position of the two electrodes (3a) and (3b) in the axial direction and gas exhaust ports (33a) for exhausting the buffer gas (G) to the outside are formed in the proximity of both ends of the heat-insulating material (6) so that flow paths in which the buffer gas flows from the side of the internal space (2) to the side of the heat-insulating material are formed between the discharge tube (31) and the electrodes (3a) and (3b).