Abstract: Disclosed is a laser device including: a laser generator configured to generate a laser beam; a first amplifier configured to amplify energy of the laser beam; and a first laser beam width adjuster comprising an aperture disposed between the laser generator and the first amplifier to limit a width of the laser beam. The aperture includes: a light transmissive portion formed to be smaller than the width of the laser beam so as to allow a central part of the laser beam to pass through; a light shielding portion formed to encompass the light transmissive portion to block a periphery of the laser beam; and a soft edge portion formed between the light transmissive portion and the light shielding portion, so that a light transmittance of the light transmissive portion gradually decreases to a light transmittance of the light shielding portion.

Abstract: Disclosed is a laser apparatus including a laser generator comprising a laser medium, a pumping light source providing light to the laser medium, a first mirror and a second mirror arranged with the laser medium therebetween, and configured to generate a laser beam of a first wavelength, a secondary harmonic wave generator configured to generate a laser beam of a second wavelength from the laser beam of a first wavelength, a light modulator arranged between the laser medium and the secondary harmonic wave generator and configured to adjust a pulse width of the laser beam of a first wavelength, and an output adjustor configured to adjust an output of the laser beam of a second wavelength generated in the secondary harmonic wave generator.