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Efficient conversion of light from sparse laser arrays into single-lobed far field using phase structures

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Abstract

An efficient beam-combining technique based on aperture filling is introduced to direct virtually all the energy of a mutually coherent laser array to the far-field main lobe. A comparison between this method and the Dammann grating method for beam superposition reveals the connection between the two and suggests specific applications for each.

© 2008 Optical Society of America

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