Chinese Optics Letters, Volume. 22, Issue 11, (2024)

Dynamically beam shaping with a compact coherently combined fiber laser array [Early Posting]

Su RongTao, Long Jinhu, Jin Kaikai, Chang Hongxiang, Ma Yanxing, Zhou Pu
Author Affiliations
  • National University of Defense Technology
  • College of Advanced Interdisciplinary Studies, National University of Defense Technology
  • No.109 Deya Road, Kaifu District
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    Dynamically beam shaping is of importance for a wide of applications, such as light field regulation, laser processing, and advanced manufacturing. In this paper, an internal phase sensing tiled-aperture coherent beam combining (CBC) system with seven beam elements was constructed for dynamic beam shaping. This system could be performed as a digital laser, where each laser beamlet functioned as an individual laser pixel. The amplitude and phase of each laser pixel could be adjusted independently in real time. In our experiment, the laser array was operated in three different configurations: the triangular, pentagon, and hexagonal laser arrays, while each laser pixel was modulated with a different piston phase of nπ (where n was an integer). We demonstrated various beam shaping patterns based on this system with output powers scaling over 1 kW. Additionally, the energy distribution of the emitted laser could be flexibly varied and customized. These results highlighted that our dynamic beam-shaped laser exhibited excellent performance in both dynamic beam-shaping and power scaling capability. This work holds great potential for numerous applications involving beam shaping.

    Paper Information

    Manuscript Accepted: May. 20, 2024

    Posted: Jun. 11, 2024

    DOI: 10.3788/COL202422.111404