Ytterbium-doped fiber amplifier with tunable repetition rate and pulse duration

A pulsed master-oscillator power fiber amplifier (MOPFA) system based on Yb3+-doped large mode area (LMA) double-clad optical fiber was developed. The system generated pulses of changeable duration ranging from about 8.5 to 250.0 ns at the repetition rate of up to 500 kHz. The laser system emitted up to 22 W of average output power at the wavelength of 1064 nm.

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