We report a large-core, Yb-doped photonic crystal fiber amplifier generating diffraction-limited (M<sup>2</sup>=1.04),∼0.45 ns,∼8 GHz linewidth pulses with energies of 540 µJ, peak power in excess of 1.1 MW, and average power of ∼7.2 W at a repetition rate of 13.4 kHz. The pulse peak spectral brightness exceeds 10 kW/(sr Hz cm2) and is the highest generated by a fiber source, to our knowledge.
© 2005 Optical Society of America
Fiber Optics and Optical Communications
Fabio Di Teodoro and Christopher D. Brooks, "1.1 MW peak-power, 7 W average-power, high-spectral-brightness, diffraction-limited pulses from a photonic crystal fiber amplifier," Opt. Lett. 30, 2694-2696 (2005)