Abstract
An acousto-optics Q-switch alexandrite laser with a 0.5 pm linewidth is described. The output energy is 20 mJ with a pulse duration of 100 ns (fwhm). A new cavity arrangement is used in which a main non dispersive resonator acting as a forced oscillator is continuously self-injected by a narrow line from an auxiliary cavity. In a separate experiment we report on a (broadband) pulse emission within 100 μs with an equal energy of 50 mJ in each pulse.
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