Laser apparatus

A laser apparatus comprising:

• a laser generator comprising a first mirror, a laser medium, and a pumping light source that provides light to the laser medium, the laser generator being configured to 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 the first wavelength, and comprising a non-linear medium, and a second mirror and a third mirror arranged with the non-linear medium therebetween;
• 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 the first wavelength;
• a driving mirror arranged on an optical path between the laser medium and the light modulator, having a total reflection surface inclined with respect to the optical path, and configured to be driven to be on or out of the optical path;
• a fourth mirror arranged on an optical path along which light reflected from the driving mirror travels;
• an output adjustor configured to adjust an output of the laser beam of the second wavelength generated in the driving secondary harmonic wave generator;
• and
• one or more optical path adjustment optical elements configured to match an output path when the laser beam of the first wavelength or the laser beam of the second wavelength is output according to a location of the driving mirror,
• wherein, when the driving mirror is on the optical path, the first mirror and the fourth mirror form a resonance path to generate the laser beam of the first wavelength, and
• when the driving mirror is moved out of the optical path, the first mirror and the third mirror form a resonance path to generate the laser beam of the first wavelength.