Lawrence Berkeley National Laboratory
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.
Published Web Locationhttps://doi.org/10.1364/ol.44.004554
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.