The operation of a diode-laser pumped thulium, holmium yttrium–lithium–fluoride laser (Tm,Ho:YLF) in Q-switched mode is reported. Output energies of 220 μJ in pulses of 22 ns duration are recorded at Q-switch frequencies commensurate with an effective upper laser level lifetime of 6 ms. This lifetime is appreciably longer than that observed in other hosts permitting stored energy extraction of 64%, close to the projected maximum performance from these materials.
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McGuckin et al. (1991) studied this question.
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