| 摘要 |
PURPOSE:To remove the pressure pulsation induced by a blower without being accompanied with the blast pressure loss of gas laser medium and making a gas laser device large in size so as to lessen a laser ray output in fluctuation and to improve the device in quality of laser processing by a method wherein a side hole is provided to the guide section of a laser resonator on a gas laser medium supply side, and a box is provided to the side hole through the intermediary of a connecting section variable in area. CONSTITUTION:As a pressure pulsation wave inside a supply duct 6 changes in propagation property at a side hole 8, the pressure pulsation wave propagates into a resonance box 10. When a gas laser medium rises in temperature and increases in sonic speed, a resonance frequency becomes higher than a pulsation frequency, and the rise of temperature is detected by a detector 20 to revolve an actuator 22 through a signal operator 23 to close a sliding valve to lessen an opening 9a in area, whereby the resonance frequency is made to decrease to the pulsation frequency. Inversely, when the gas laser medium decreases in temperature and the resonance frequency becomes lower than the pulsation frequency, the actuator is made to rotate reversely to make the opening 9a large in area, whereby the resonance frequency is made to increase up to the pulsation frequency. |
