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Comparison of temporal beam profiles of short-pulse, flashlamp-pumped, solid-state, Holmium:YAG laser (red) and the diode-pumped, Thulium fiber laser (blue). The greater amount of energy contained in the initial spike of the Holmium temporal beam profile contributes to the initial vapor bubble expansion and collapse and consequently greater stone retropulsion observed with the Holmium laser than with the Thulium fiber laser.
