Patent ID: 8817838

Claim:
A laser device comprising: a one-piece plate having a first surface, a second surface opposite to the first surface, and holes for an optical path of a laser light; an oscillator unit being disposed at the first surface of the plate, and comprising a laser oscillator for generating the laser light and a rectangular-solid-shaped housing for the oscillator; an amplifier unit being disposed at the first surface of the plate, and comprising an amplifier for amplifying the laser light from the oscillator and a rectangular-solid-shaped housing for the amplifier; and an optical element module being disposed on the second surface of the plate, and comprising a first group of optical elements and a second group of optical elements, the first group of optical elements comprising one or more optical elements for receiving the laser light from the oscillator unit or the amplified laser light from the amplifier unit through a hole, and guiding the laser light or the amplified laser light to the amplifier unit through a hole, and the second group of optical elements comprising one or more optical elements for receiving the amplified laser light from the amplifier unit through a hole, and guiding the amplified laser light as a laser output.