Near-diffraction-limited angle-switchable output beam from a broad-area diode laser with an intracavity spatial phase controller

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Abstract
The production of a near-diffraction-limited single-lobed angle-switchable output beam from a broad-area diode laser with an intracavity spatial phase controller is demonstrated. This 100-μm-wide broad-area laser produces a 0.8° full width at half maximum output beam at single-facet pulsed powers of ≳300 mW. The spatial phase controller operates in two distinct modes (thermal and gain), providing beam scanning over 1.4° and beam switching of 8°. The phase controller also permits a dynamic study of the effect of wavefront tilt on device coupling and phasing.