12 March 2014 High energy, high average and peak power phosphate-glass fiber amplifiers for 1micron band
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Abstract
Heavy doping of common silica gain fibers is not practical; therefore long fibers are required for efficient amplification (usually 5-10m). This is undesirable due to nonlinearities that grow with fiber length. In contrast, NP Photonics phosphate-glass based fibers can be heavily doped without any side-effects, and hence can provide very high gain in short lengths (less than 0.5m). This enables an ideal pulsed fiber amplifier for a MOPA system that maximizes the energy extraction and minimizes the nonlinearities. We demonstrate 1W average power, 200μJ energy, and >10kW peak power from a SBS-limited all-fiber MOPA system at 1550nm, and 32W average power, 90μJ energy, and 45kW peak power from a SRS and SPM limited all-fiber MOPA system at 1064 nm. These results were limited by the seed and pump sources.
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M. Akbulut, A. Miller, K. Wiersma, J. Zong, D. Rhonehouse, D. Nguyen, A. Chavez-Pirson, "High energy, high average and peak power phosphate-glass fiber amplifiers for 1micron band", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89611X (12 March 2014); doi: 10.1117/12.2040721; https://doi.org/10.1117/12.2040721
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