Large-energy hundred-picosecond 1064nm laser

The utility model provides a large-energy hundred-picosecond 1064nm laser, which is used for solving the problems that a laser in the prior art is not easy to output efficiently, the system is complicated, the manufacturing cost is low and the like. The laser comprises a 1064nm hundred-picosecond seed source, a plano-convex lens I, an optical isolator, a beam shrinking collimating lens group, a 45-degree high-reflectivity mirror I, a 45-degree high-reflectivity mirror II, a first-stage amplifier, a polarizing film, a second-stage amplifier, a quarter-wave plate, a 0-degree reflecting mirror, a 45-degree high-reflectivity mirror III, a beam expanding collimating lens group, a 45-degree high-reflectivity mirror IV, a 45-degree high-reflectivity mirror V and a third-stage amplifier. By the adoption of the two-way amplification technology, laser beam output of 400 mJ energy is finally achieved, the pulse width is 300 ps, and adjustable output of repetition frequency of 1-10 Hz can be achieved. And under different