80-W dual-wavelength green pulsed laser based on a Yb-doped rod-type fiber amplifier

We developed a high-power dual-wavelength green pulsed laser that generates 528-nm and 535-nm laser pulses which overlap completely in time and space. Two single-frequency seed lasers of 1056 nm and 1070 nm are combined and amplified to 140 W through a series of ytterbium-doped fiber amplifiers including a rod-type fiber amplifier, and the amplified laser pulses of two wavelengths are frequency-doubled, respectively, by two consecutive lithium triborate crystals. The total green power is more than 80 W at a 400-kHz repetition rate, and the power ratio between the two green wavelengths can be adjusted.