High-peak-power (>1.2 MW) pulsed fiber amplifier

Roger L. Farrow; Dahv A. V. Kliner; Paul E. Schrader; Alexandra A. Hoops; Sean W. Moore; G. Ronald Hadley; Randal L. Schmitt

doi:10.1117/12.646815

23 February 2006 High-peak-power (>1.2 MW) pulsed fiber amplifier

Roger L. Farrow, Dahv A. V. Kliner, Paul E. Schrader, Alexandra A. Hoops, Sean W. Moore, G. Ronald Hadley, Randal L. Schmitt

Author Affiliations +

Proceedings Volume 6102, Fiber Lasers III: Technology, Systems, and Applications; 61020L (2006) https://doi.org/10.1117/12.646815
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

We report results from Yb-doped fiber amplifiers seeded with two microchip lasers having 0.38-ns and 2.3-ns pulse durations. The shorter duration seed resulted in output pulses with a peak power of >1.2 MW and pulse energy of 0.67 mJ. Peak power was limited by nonlinear processes that caused breakup and broadening of the pulse envelope as the pump power increased. The 2.3-ns duration seed laser resulted in output pulses with a peak power of >300 kW and pulse energy of >1.1 mJ. Pulse energies were limited by the onset of stimulated Brillouin scattering and ultimately by internal optical damage (fluences in excess of 400 J/cm² were generated). In both experiments, nearly diffraction-limited beam profiles were obtained, with M² values of <1.2. Preliminary results of a pulse-amplification model are in excellent agreement with the experimental results of the amplifiers operating in the low-to-moderate gain-depletion regime.

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Roger L. Farrow, Dahv A. V. Kliner, Paul E. Schrader, Alexandra A. Hoops, Sean W. Moore, G. Ronald Hadley, and Randal L. Schmitt "High-peak-power (>1.2 MW) pulsed fiber amplifier", Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61020L (23 February 2006); https://doi.org/10.1117/12.646815

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