32 W 100 MHz high repetition rate lasers with narrow bandwidth and tunable wavelength

100 MHz high repetition rate lasers are experimentally realized with narrow bandwidth and tunable wavelength. A single-frequency CW seed source is modulated by an electro-optical (EO) modulator to achieve pulsed lasers. The pulsed laser is amplified by a fiber amplifier and then by a two-stage solid-state laser amplifier. The maximum output power is 31.9 W in fundamental mode. The M2 factor is less than 1.5. The pulse width is 1 ns with a repetition rate of 100 MHz. The line-width of the output laser is less than 0.8 GHz. The experimental results verify the validity of method to achieve high repetition rate lasers. The combined amplifier with both fiber amplifier and solid-state laser amplifier is approved to be effective to achieve power amplification.