Abstract
The 5I7 transition in Ho ions in an ytrrium scandium gallium garnet crystal containing Cr, Tm, and Ho (λ = 2.088 μm) resulted in Q-switched lasing when the crystal was pumped with a flashlamp at room temperature. The output energy of a giant pulse was 280 mJ when a rotating prism was employed and 80 mJ when an electrooptic switch was used (the repetition frequency was 1 Hz in both cases).
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