A novel acousto-optic switch operation by a simple laser-diode pumped acousto-optic, Q-switched, ytterbium-doped, double-clad fiber laser is reported. Stable compressed Q-switched sub- pulses with a beam quality factor are achieved at the repetition rate of . Q-switched pulses of pulse energy and pulse width are obtained at the repetition rate of . Finally, a reasonable explanation of the novel Q-switched operation is presented.
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