Open AccessDeterministic stabilization of eight-way 2D diffractive beam combining using pattern recognition
Author(s) -
Qiang Du,
Tong Zhou,
Lawrence Doolittle,
Gang Huang,
Derun Li,
Russell Wilcox
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.004554
Subject(s) - optics , beam (structure) , channel (broadcasting) , square (algebra) , phase (matter) , scaling , computer science , phase retrieval , usable , diffraction , stability (learning theory) , ptychography , physics , diffraction efficiency , intensity (physics) , power (physics) , algorithm , fourier transform , mathematics , telecommunications , geometry , quantum mechanics , machine learning , world wide web
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.