Design of very large-mode-area Yb-doped photonic crystal fiber for high-energy pulsed laser output with squared shape

Kuo Meng; Lianqing Zhu; Guang Yan; Fei Luo

doi:10.1117/12.2181837

4 May 2015 Design of very large-mode-area Yb-doped photonic crystal fiber for high-energy pulsed laser output with squared shape

Kuo Meng, Lianqing Zhu, Guang Yan, Fei Luo

Author Affiliations +

Proceedings Volume 9543, Third International Symposium on Laser Interaction with Matter; 95431N (2015) https://doi.org/10.1117/12.2181837
Event: Third International Symposium on Laser Interaction with Matter, 2014, Jiangsu, China

Abstract

The rare earth-doped active fibers owning ten thousands of square-micron core-area but also delivering laser with high beam quality have little been reported. In this paper, we have designed a large-mode-area Yb³⁺-doped photonic crystal fiber in the cladding region with square-array air holes. Simulations demonstrate that only fundamental mode (FM) with mode-field-area (MFA) of ~15500 μm² can be amplified and propagated at the gain saturation, and the beam quality M² is less than 1.5. It is predicted that almost 58 mJ per-pulse can be available from such a 1.0 meter-length fiber, and the beam shape of amplified laser is near squared. It will be potential for so huge pulse-energy output from the VLMA LPF to be applied in the remote detecting, high-intensive welding and so on.

Citation Download Citation

Kuo Meng, Lianqing Zhu, Guang Yan, and Fei Luo "Design of very large-mode-area Yb-doped photonic crystal fiber for high-energy pulsed laser output with squared shape", Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 95431N (4 May 2015); https://doi.org/10.1117/12.2181837

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