Coherently coupled vertical cavity surface emitting laser (VCSEL) arrays have the potential for ultra-compact beam steering [1], high brightness [2], and high bandwidth modulation [3] microcavity laser sources, all of which are critical components for emerging photonic capabilities. We have developed phased VCSEL arrays which utilize a photonic crystal to define the multiple optical cavities combined with ion implantation to separately define the gain regions and allow separate current injection into the cavities [4]. The leaky-mode coupling between the cavities is engineered via the photonic crystal hole pitch and diameter, while separate current injection enables control of the phase between the elements. Both in phase (with single far field optical lobe on axis) and out-of-phase (multiple far field lobes off-axis) have been demonstrated for both top [2] and bottom emitting [5] coherently coupled arrays. Examples of 1×2, 2×2, and 4×4 arrays are shown in Fig. 1.