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Measurements on commercially available fused silica fibers and fiber tapers have shown that Nd:glass laser pulses of irradiance ≫3.5 GW cm-2 can be transmitted without bulk or surface damage. Optical energy at the fiber output can be used for efficient acceleration of thin metal foils. For 0.025‐mm‐thick aluminum coupled to a 0.2‐mm‐diam fiber, target foil velocities up to 2.3 km s-1 have been achieved with very modest laser energies (≪25 mJ).