Abstract
We first report on a stable ReSe2 passively Q-switched Nd:Y3Al5O12 bulk laser near room temperature, which can generate near-repetition rate limit of microsecond pulse output at full depth modulation. A new kind of two-dimensional transition metal dichalcogenide, ReSe2, is exploited as an excellent saturable absorber at 1.06μm with extremely high rate of loss modulation. The microsecond pulse repetition rate of as high as 274 kHz can be achievable under the pump power of 7.3 W, with the pulsewidth of 1.08μs and the pulse energy of 2.5 μJ. As the pump power varies from 4.4 to 7.3 W, the pulse repetition rate is tunable from 204 to 274 kHz. The good stability in operation is evaluated with power fluctuation less than 1%. The ultrahigh repetition rate of microsecond pulse source can be suitable for differential absorption lidar of monitoring atmospheric environment, which can meet the specific requirements of adequate interaction duration and sufficient sampling rate to improve the signal-to-noise ratio.
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