Picosecond laser

The invention discloses a picosecond laser, comprising a seed laser assembly and a pulse width compression assembly, the compression assembly compresses the laser output from the seed laser assembly to ps level, and the picosecond laser also has an energy amplifying assembly having two laser rods distributed along the optical path, the laser transmitted into the energy amplifying assembly passes through at least two amplifications of one of the laser rods before emitting light, the picosecond laser of the invention has the seed laser assembly, the pulse width compression assembly and the energy amplifying assembly, and the laser compressed by the pulse width compression assembly is output after being amplified by the energy amplifying assembly, wherein, the laser of the energy amplifying assembly of the invention shall be amplified at least twice by a laser rod along the optical path, and the obtained laser has larger energy to meet the use requirements. 本发明公开了种皮秒激光器，包括种子激光组件、脉宽压缩组件，该脉宽压缩组件将种子激光组件输出的激光压缩至ps级，