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Acousto-optically Q-switched cavityless weak-feedback laser based on Nd:GdVO4bounce geometry

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Abstract

An acousto-optically Q-switched laser with a cavityless weak-feedback configuration, which is based on a Nd:GdVO4 bounce geometry, is demonstrated. The laser can operate at repetition rates of up to 500 kHz with output power above 4 W. The pulse-width at 100 kHz reaches 5.2 ns, which is 4.3 times the roundtrip time. A theory for a Q-switched cavityless weak-feedback laser is proposed for the first time, to the best of our knowledge. This theory is suitable for analyzing short pulses comparable to the roundtrip time. By utilizing the theory, a simulation is implemented for our experimental conditions. Agreement between the simulation and the experimental results proves the validity of our theory.

© 2019 Optical Society of America

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