LASER FOR LASER MACHINING

摘要

A laser device for laser machining, which uses a wavelength-converted laser beam and minimizes the output power fluctuation. A laser beam emitted by a laser source (11) is passed through a nonlinear optical crystal (1), such as LBO and CLBO, and emitted as a wavelength-converted beam. The temperature of the nonlinear optical crystal (1) is measured by a sensor (3) and supplied to a controller (5) through a sensor amplifier (4). The controller (5) stores phase matching angles that allow the maximum output power corresponding to the temperatures of the nonlinear optical crystal. The controller (5) drives a drive unit (6) according to the measured temperature of the nonlinear optical crystal (1) so that an angle adjustment (7) may adjust the angle of the crystal axis of the nonlinear optical crystal (1) to achieve an optimal phase matching angle.