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The laser action in the Er:YAG and Er:YAP laser crystals pumped by 1535 nm Er:glass radiation has been demonstrated. The 45 mJ and 20 mJ maximal energy was reached for Er:YAG and Er:YAP laser systems, respectively. The slope efficiency of the output energy to the absorbed energy was 60.7 % for Er:YAG active crystal and 32.1 % for Er:YAP active medium. The obtained output beam spatial profiles were...
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