A 6-element hexagonal vertical-cavity surface-emitting laser array is resonantly tuned to coherence. The far-field profile is narrowed in two-dimensions, with a Full Width at Half Maximum of 2° compared to a single-emitter with 10° FWHM. Multiple coherent outputs are possible dependent on the tuned bias condition, making this technology promising for two-dimensional mode engineering.

© 2019 The Author(s)

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