Milli-Joule energy-level and 600-femtosecond Yb-laser pulses were delivered in several meter long Kagome hollow-core-photonic-crystal-fibers in robustly single-mode fashion. Self-compression to 50fs, and intensity-level of petawatt/cm2 were achieved. Free focusing-optics laser-micromachining is demonstrated on several materials.

© 2013 Optical Society of America

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