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Sequential phase locking scheme for a filled aperture intensity coherent combination of beam arrays

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posted on 2023-01-11, 21:51 authored by Arno Klenke, Michael Müller, Henning Stark, Andreas Tünnermann, Jens Limpert
We present a novel phase locking scheme for the coherent combination of beam arrays in the filled aperture configuration. Employing a phase dithering mechanism for the different beams similar to LOCSET, dithering frequencies for sequential combination steps are reused. By applying an additional phase alternating scheme, this allows to use standard synchronized multichannel lock-in electronics for phase locking a large number of channels even when the frequency bandwidth of the employed phase actuators is limited.

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