| 摘要 |
PURPOSE:To enable response at high speed of a laser output by a method wherein one part of laser beams is extracted, laser beams are photosensitized uniformly by using a waveguide tube type hollow waveguide, an output from the laser beams is detected by a photodetector, a laser-beam output command and the output are compared and the intensity of excitation of a laser medium is controlled in a laser output controller. CONSTITUTION:High voltage from a power supply 10 is applied to a pair of electrodes 9A and 9B in a vessel 7 filled with a laser medium gas 8 containing CO2 gas, a total reflection mirror 12 and a partial transmitting mirror 13 are each disposed on both sides of discharge 11 generated between the electrodes 9A and 9B, and laser beams reciprocating between these mirrors 12 and 13 are radiated to the outside as output beams 14 while one side is used as detecting laser beams 15. Detecting laser beams 15 among them are projected to an input port 28 for a waveguide tube type hollow waveguide 26, on an inner surface thereof a total reflection mirror is formed, and emitted from an output port 29 with a minute hole. Accordingly, beams dimmed even to approximately 1/1,000 are detected by a detector 19, and compared with an output command 17, and output voltage from the power supply 10 is controlled through an amplifier 18. |
