Diffraction limited 1.4 W pulsed output power is demonstrated from a two-dimensional 144 element surface emitting laser array placed in an external Talbot cavity. Phase locking of the array is achieved with a parallel phase sensing and control system based on phase contrast imaging used in combination with a liquid crystal array in the laser cavity. Diffraction limited cw operation is also demonstrated.
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Sanders et al. (1994) studied this question.
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