Dual-wavelength output picosecond laser

The utility model discloses a dual-wavelength output picosecond laser, which comprises a shell, a seed source arranged in the shell, a first polarizing film, a crystal rod, a first reflecting mirror, a second reflecting mirror arranged above the first reflecting mirror, and a second polarizing film arranged above the second reflecting mirror, the relative included angle between the second reflecting mirror and the first reflecting mirror is 90 degrees, the first 1/2 wave plate, the second polaroid, the third polaroid, the frequency doubling crystal and the spectroscope are sequentially arranged on the left side of the second reflecting mirror, the pulse xenon lamp is arranged above the crystal rod, and the second 1/2 wave plate is used for providing energy for the crystal rod and is movably arranged on the inner side face of the shell through a rotator. The second 1/2 wave plate can move up and down through the rotator, the second 1/2 wave plate is located between the second polaroid and the third polaroid wh