Abstract: In one discharge tube in which laser gas flows, a plurality of microwave generating units composed of microwave power sources, magnetrons and waveguides are disposed, and each magnetron oscillates intermittently by switching the drive of the microwave power source. A main controller provides a reference clock to a power source unit composed of the plurality of microwave power sources. By this reference clock, adjacent microwave power sources in the power source unit are switched and driven at a predetermined phase difference through a phase shifter. Accordingly, discharge interference in adjacent discharge areas is avoided, so that a stable laser beam output may be obtained.

Abstract: A gas laser apparatus for generating a laser beam along a light beam axis, comprises, a gas as a laser medium, a dielectric tube through which the gas passes, and which surrounds the light beam axis, a pumping source generating an electric discharge through the gas existing in the dielectric tube to excite the gas so that a laser light is generated from the excited gas, and a gas blower blowing the gas into the dielectric tube, wherein the gas blower forms a circumferential flow direction component of the gas in the dielectric tube.

Abstract: A microwave excited gas laser apparatus includes a single unit having at least first, second, third, and fourth waveguides. The first and second waveguides meet at a first intersection. The third and fourth waveguides meet at a second intersection. A discharge tube contains a laser medium gas, and extends through the first and second intersections. Microwaves are radiated into the first, second, third, and fourth waveguides. The discharge tube in the first intersection is exposed to a microwave propagated along the first waveguide and a microwave propagated along the second waveguide. The discharge tube in the second intersection is exposed to a microwave propagated along the third waveguide and a microwave propagated along the fourth waveguide.

Abstract: A laser apparatus includes an output mirror and a total reflection mirror. A discharge tube is located between the output mirror and the total reflection mirror. The discharge tube contains laser medium gas. A first block connected to a first end of the discharge tube supports the first end of the discharge tube and also the output mirror. A second block connected to a second end of the discharge tube supports the second end of the discharge tube and also the total reflection mirror. A third block connected to an intermediate portion of the discharge tube supports the intermediate portion of the discharge tube. An optical bench supports the first block, the second block, and the third block. A turboblower connected to the third block is supported by the third block. A first passage connects the turboblower and the first block. A second passage connects the turboblower and the second block.

Abstract: Carbon dioxide gas is fed in a metallic laser tube extending along an optical axis through a plurality of gas feeding tubes placed outside the optical axis and is taken out from the metallic laser tube by a blower to circulate the carbon dioxide gas, and the carbon dioxide gas held in the metallic laser tube is cooled by a gas cooling element. A pair of microwaves in which electric fields oscillated in different directions are induced are injected from a pair of gas injecting points of the gas feeding tubes close to the ends of the metallic laser tube and are combined in the metallic laser tube.

Abstract: In a high velocity gas laser oscillator of radio frequency or microwave exciting type, both end parts of the discharge tube are provided with gas flow rectifiers for making an inward flowing whirlwind at the discharge region of the discharge tube by blowing the discharge gas through plural slits located in a plane disposed at a predetermined angle with respect to a plane including axis of the discharge tube, wherein microwave power is applied to the discharge tube so as to define an annular discharge region in the discharge tube.

Abstract: A laser resonator includes; an optical oscillator including a discharge tube, and a pair of reflecting mirrors arranged at both ends of the discharge tube while inner surfaces of the mirrors confront each other; electrodes confronting each other with the discharge tube held therebetween; a gas pipe connected to the optical oscillator, and a gas circulating device connected to the gas pipe for circulating laser gas, wherein the laser resonator generates laser light when a voltage impressed to the electrodes invites discharge of the discharge tube while laser gas is circulated in the discharge tube by the gas circulating device.

Abstract: This invention relates to a PWM inverter apparatus in which the carrier frequency of the PWM generated voltage is selected to be 8 kHz-16 kHz, and the rotation speed of a motor 9 is controlled so that generated magnetic noise is not audible.Further, a triangular wave oscillating part 11 varying the frequency in response to a signal from a frequency setting part 1 is provided in a control circuit part 2 to control the rotation speed of the motor 9 so that the generated magnetic noise can be limited to the desired value.