LASER MACHINING SYSTEM HAVING HIGH TRANSMISSION POWER STABILIZER AND OPTICAL ATTENUATOR

摘要

PURPOSE: A laser machining system having high transmission power stabilizer and optical attenuator is provided to perform precision-machining by using an output stabilizing device. CONSTITUTION: A laser machining system having high transmission power stabilizer and optical attenuator comprises a laser unit(20), a half-wave plate(21), and a molten silica plate(22) and a PID controller. The laser unit emits a pulse laser beam. The half-wave panel converts the inflow angle of layer beam and varies a polarization value about a brewster window. The molten silica plate comprises the brewster window which is tilted in Brewster`s angle. The PID controller collects the light passing through the window by an optical detector and a peak/sample hold amplifier.