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Deterministic stabilization of eight-way 2D diffractive beam combining using pattern recognition.
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https://doi.org/10.1364/ol.44.004554Abstract
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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