| 摘要 |
PROBLEM TO BE SOLVED: To achieve an optimum laser treatment and to form, for example, a reliable semiconductor film without any scattering, by exciting a laser medium provided for a laser oscillator and a laser amplifier with asynchronous pulses, and forming a plurality of peaks by synthesizing the formed laser pulses. SOLUTION: A laser device consists of an oscillator 1 and at least one-stage amplifier 2 and is connected to a trigger pulse oscillation circuit 3 by cables 10 and 11. Each laser device has excitation devices 4 and 5 to excite a laser medium. A trigger pulse is applied only to the oscillator 1. Then, laser beams are generated, advance toward the amplifier 2, and are transmitted without being amplified. After a while, the laser beams being resonated in the oscillator 1 are attenuated. Then, by applying a trigger pulse only to the amplifier 2, weak laser beams remaining in the oscillator 1 are amplified by the amplifier 2 to generate two peaks. Two laser pulses essentially extend a pulse width. |
