Towards MW-level all-glass ytterbium tapered double-clad fiber laser

Ebrahim Aghayari; Hossein Fathi; Regina Gumenyuk; Andrey Grishchenko; Farrukh Safin; Yiran Liu; Tianhua Wang; Wolfgang Neuberger; Valery Filippov

doi:10.1117/12.3037617

8 November 2024 Towards MW-level all-glass ytterbium tapered double-clad fiber laser

Ebrahim Aghayari, Hossein Fathi, Regina Gumenyuk, Andrey Grishchenko, Farrukh Safin, Yiran Liu, Tianhua Wang, Wolfgang Neuberger, Valery Filippov

Author Affiliations +

Proceedings Volume 13232, Advanced Lasers, High-Power Lasers, and Applications XV; 1323206 (2024) https://doi.org/10.1117/12.3037617
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

This paper presents all-fiber master oscillator-power amplifier systems that deliver high average power picosecond pulses with durations of 6 to 50ps, a tunable repetition rate within 360 kHz to 1 GHz range, and peak powers of up to 2 MW. The experimental investigations incorporate two Yb-doped spun tapered double-clad fibers gain modules with 60 μm and 92 μm core diameters. Utilizing the 92 μm core module picosecond pulses with high average power of 625 W average power at 20 MHz, and 645 W at 1 GHz were achieved. The gain module with 60 μm core diameter enabled to deliver a high peak power pulsed- signal with 2 MW peak power at 360 kHz and 50 ps pulse duration, while 26 MHz and 6 ps pulses reached 1 MW peak power. In all configurations, near-diffraction-limited beam quality, M² ⪅ 1.4, was maintained without any traces of Transverse Mode Instability (TMI). These compact, TMI-free, high-power amplifiers offer a promising platform for high-power ultrafast fiber lasers for the vast majority of industrial applications.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ebrahim Aghayari, Hossein Fathi, Regina Gumenyuk, Andrey Grishchenko, Farrukh Safin, Yiran Liu, Tianhua Wang, Wolfgang Neuberger, and Valery Filippov "Towards MW-level all-glass ytterbium tapered double-clad fiber laser", Proc. SPIE 13232, Advanced Lasers, High-Power Lasers, and Applications XV, 1323206 (8 November 2024); https://doi.org/10.1117/12.3037617

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