Near-field beam shaping in high-power single-frequency pulsed Er/Yb co-doped multimode fiber amplifier by seed wavefront modulation

Shuen Wei; Ori Henderson-Sapir; Linh V. Nguyen; Stephen C. Warren-Smith; Heike Ebendorff-Heidepriem; David J. Ottaway

doi:10.1117/12.3000920

12 March 2024 Near-field beam shaping in high-power single-frequency pulsed Er/Yb co-doped multimode fiber amplifier by seed wavefront modulation

Shuen Wei, Ori Henderson-Sapir, Linh V. Nguyen, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, David J. Ottaway

Author Affiliations +

Proceedings Volume 12865, Fiber Lasers XXI: Technology and Systems; 128650C (2024) https://doi.org/10.1117/12.3000920
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

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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Shuen Wei, Ori Henderson-Sapir, Linh V. Nguyen, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, and David J. Ottaway "Near-field beam shaping in high-power single-frequency pulsed Er/Yb co-doped multimode fiber amplifier by seed wavefront modulation", Proc. SPIE 12865, Fiber Lasers XXI: Technology and Systems, 128650C (12 March 2024); https://doi.org/10.1117/12.3000920

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