Laser apparatus

A laser apparatus comprising:

• an optical device having a first reflection mirror and a second reflection mirror arranged to face each other and one waveguide formed between the first reflection minor and the second reflection mirror;
• and
• a laser irradiation device configured to irradiate the optical device with laser,
• wherein the optical device is configured so that at least a portion of the laser travels on the waveguide by being reflected by the first reflection minor and the second reflection minor in order,
• wherein the optical device comprises an output surface configured to emit a portion of the laser,
• wherein the first reflection mirror transmits a portion of the laser and reflects another portion of the laser,
• wherein the output surface is formed on a surface of the first reflection mirror,
• wherein the laser irradiation device comprises a plurality of irradiation parts including a first irradiation part configured to irradiate a first laser and a second irradiation part configured to irradiate a second laser,
• wherein an irradiation direction in which the first irradiation part irradiates the first laser to the waveguide of the optical device is not parallel to an irradiation direction in which the second irradiation part irradiates the second laser to the waveguide of the optical device when viewed from a normal direction of the output surface, and
• wherein a traveling direction of the first laser is not parallel to a traveling direction of the second laser in the waveguide when viewed from the normal direction of the output surface.