Abstract
We report on a miniature crystal laser at 1.01 μm that is passively -switched with a sapphire-based few-layer saturable absorber, and that can be operated under very high output couplings (). With 12.6 W of pump power absorbed, an average output power of 4.35 W is generated at a repetition rate of 1.33 MHz with a slope efficiency of 47%. The maximum pulse energy and highest peak power achieved are 3.41 μJ and 110 W, respectively; while the shortest pulse duration obtained is 28.6 ns. To the best of our knowledge, these results represent the highest output power and shortest pulse duration ever achieved in the 1 μm region from solid-state lasers passively -switched by using two-dimensional saturable absorbers.
© 2018 Optical Society of America
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