We experimentally demonstrate single frequency pulsed amplification at 1550 nm using an erbium and ytterbium co-doped multimode fiber. At a repetition rate of 10 kHz, 3.5 kW of peak power with 15 dB gain were generated with a pulse duration of 200 ns. By adjusting the seed wavefront using a spatial light modulator, the output can be shaped to a focused spot while maintaining a gain exceeding 10 dB. Further power scaling is anticipated, and our latest results will be presented.
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Wei et al. (2024) studied this question.
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