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Nowadays, the development of fiber laser beam combining faces new challenges during propagating through the real long-range atmosphere. Aberrations in such transmission systems include turbulenceinduced dynamic aberrations located at the path from the fiber laser array to the target, besides the inherent phase errors like phase noises and tip/tilt errors. Existing techniques, e.g., target-in-the-loop and delayed stochastic parallel gradient descent, are difficult to deal with the fast-changing turbulence-induced tip/tilt aberrations. But correcting these aberrations is critical for obtaining combined laser beams on the target with the best beam quality. In this paper, research progress of multi-aperture laser transceiving control for beam combining applications in IOE, CAS is presented. These novel techniques presented here provide efficient ways to achieve tip/tilt control for the beam coupling from space to fiber and the outgoing laser beams in the beam combining applications.

Research Progress of Multi-aperture Laser Transceiving Control for Beam Combining Applications in IOE, CAS