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Physical Sciences

Lawrence Berkeley National Laboratory

81-beam coherent combination using a programmable array generator.

Published Web Location

https://doi.org/10.1364/oe.416499
Abstract

We have generated 81 independently controllable beams using a spatial light modulator and combined them on a diffractive combiner, to characterize the combiner and develop a fast phase error detection scheme. A key parameter of the diffractive combiner is measured in a new way, enabling an efficient combination when programming calibrated phases of each beam. This testbed provides a platform for development of advanced feedback phase control of high channel-count beam combination.

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