Abstract
ZnSe:Cr2+ lasers coherently pumped either by flashlamp-pumped Er:YAP (wavelength 1.66μm) or diode pumped Tm:YAP (wavelength 1.97μm) laser radiations were characterized and compared. The maximal ZnSe:Cr2+ laser output pulse energy was 14mJ with the slope efficiency 70% for Er:YAP pump. With the help of dispersive prism inside the resonator, the generated laser radiation was tunable from 2.15μm to 2.6μm with only 3 times drop in laser output energy. With pumping by Tm:YAP laser radiation the pulsed as well as cw regime was investigated. In case of cw the output was 200mW for absorbed power of 300mW with the slope efficiency 66%. The temporal profile and spatial structure of the generated laser beam were measured for both pumping arrangements.
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