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Spectroscopic properties and lasing of Fe:ZnSe and co-doped Fe:Cr:ZnSe crystals in the mid-infrared spectral range were studied at room and low temperatures. Using a free-running Er:YAG laser as a pump source, the output energy of the thermoelectrically cooled Fe:ZnSe laser was 142 mJ with 30% slope efficiency at T=220 K. Passive Q-switched oscillation of Er:YAG laser with Fe:ZnSe crystal was demonstrated...
Summary form only given. We have demonstrated an efficient, high-performance passive Q-switching for the alexandrite laser utilizing LiF:N/sub 1//sup -/ crystal yielding 50-mJ pulses of 80-ns (FWHM) pulse duration with efficiency (with respect to the free-running oscillation) of about 50%.
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