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Deterministic stabilization of eight-way 2D diffractive beam combining using pattern recognition.

  • Author(s): Du, Qiang
  • Zhou, Tong
  • Doolittle, Lawrence R
  • Huang, Gang
  • Li, Derun
  • Wilcox, Russell
  • et al.
Abstract

We demonstrate a new method for controlling diffractive, high-power beam combination, sensing phase errors by analyzing the intensity pattern of uncombined side beams at the output. A square array of eight beams is combined with <0.3% stability and 84.6% efficiency. As the channel count is increased, so does the usable information, enabling scaling to large channel counts without significant slowing of control loop response time, an advantage over single-input algorithms.

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