Abstract
We report a large-core, Yb-doped photonic crystal fiber amplifier generating diffraction-limited linewidth pulses with energies of , peak power in excess of 1.1 MW, and average power of at a repetition rate of 13.4 kHz. The pulse peak spectral brightness exceeds and is the highest generated by a fiber source, to our knowledge.
© 2005 Optical Society of America
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