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An AOQ (acoustic-optic Q-switched) laser with cavityless weak-feedbackconfiguration is demonstrated based on a Nd:GdVO4 bounce geometry. The lasercan operate at a repetition up to 500 kHz with the output power above 4W. Thepulse-width at 100 kHz reaches 5.2 ns, which is 4.3 times the round-trip time.A theory of Q-switched cavityless weak-feedback laser is proposed for the firsttime, to our best knowledge. This theory is very suitable for analyzing shortpulses comparable to round-trip time. By utilizing the theory, simulation isimplemented for our experimental conditions. The consistence between thesimulation and the experimental results proves the validity of our theory.

Acoustic-optic Q-switched cavityless weak-feedback laser based on Nd:GdVO4 bounce geometry