3.8 kW high brightness MOPA fiber laser

Tianyu Zhu; Wei Wang; Siwei Zhang; Minzhe Liu; Kun Zhao; Ruizhan Zhai; Zhongqing Jia

doi:10.1117/12.2690157

17 August 2023 3.8 kW high brightness MOPA fiber laser

Tianyu Zhu, Wei Wang, Siwei Zhang, Minzhe Liu, Kun Zhao, Ruizhan Zhai, Zhongqing Jia

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 1275727 (2023) https://doi.org/10.1117/12.2690157
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

We demonstrated a 3.8 kW-level all-fiberized high-brightness laser with the structure of MOPA (master oscillator power amplification). The maximum output power is ~3894 W with the SRS (stimulated Raman scattering) intensity 10 dB below and ~3812 W with the SRS intensity 20 dB below. The spectrum has a central wavelength of 1080 nm with an FWHM (full width at half-maximum) bandwidth of ~2.2 nm. The slope efficiency of the fiber amplifier with respect to the pump power is ~81%. With a 25-μm-core ytterbium-doped gain fiber of the amplifier and 30-μm-core output fiber, the laser can keep a high beam quality (M² ) which is estimated to be about 2.6 below.

Citation Download Citation

Tianyu Zhu, Wei Wang, Siwei Zhang, Minzhe Liu, Kun Zhao, Ruizhan Zhai, and Zhongqing Jia "3.8 kW high brightness MOPA fiber laser", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 1275727 (17 August 2023); https://doi.org/10.1117/12.2690157

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