Abstract

Closely packed arrays of actively interacting vertical-cavity surface-emitting lasers show spontaneous long-range phase locking into periodic Bloch steady states. We study the case in which a staggered application of two biases creates a two-cavity-species array. Analysis and simulations show that the phase shift ${\mathrm{\Phi }}_{\mathit{AB}}$ among neighbor sites is controlled by the ratio of the applied biases $I_A/I_B$ among two-cavity species. For modest array sizes, the near field ${\mathrm{\Phi }}_{\mathit{AB}}$ causes a small angular deviation (beam steering) in the far-field pattern relative to the uniform array $I_A=I_B$ case.

© 2005 Optical Society of America

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