Pu Zhou

TL;DR: In this paper, the authors present theoretical and experimental research on coherent beam combining of fiber amplifiers using stochastic parallel gradient descent (SPGD) algorithm and demonstrate the feasibility of beam combining using SPGD algorithm analytically.

TL;DR: Coherent beam combination of a 1.08 kW fiber amplifier array has been demonstrated for the first time and the fringe contrast of the far-field intensity pattern is improved to more than 85%, and the residual phase error is less than λ/15.

TL;DR: The new horizon opened by the recently developed SFS is reviewed, and a kilowatt-level high power SFS based on a tandem pumping technique will be demonstrated for the first time, and the first hundred-watt level linearly polarized random fiber laser is presented.

TL;DR: It is found that tandem-pumped Yb-doped fiber lasers and amplifiers, based upon state-of-art fiber technology, have the potential to achieve a power limit of 70.7 kW with a core diameter of 63.4 μm.

TL;DR: This is the first demonstration of all-fiberized amplifiers with narrow linewidth, near linear polarization, and near-diffraction-limited beam quality at 2 kW power-level and both the polarization extinction ratio and beam quality are maintained well during the power scaling process.