An eight-layer silicon optical phased array uses passive delay lines and wavelength tuning to steer a beam in two orthogonal directions without grating couplers.
Fast spatial beam shaping by acousto-optic diffraction for 3d non-linear microscopy,
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Dual-Axis Beam-Steering OPA with purely Passive Phase Shifters
An eight-layer silicon optical phased array uses passive delay lines and wavelength tuning to steer a beam in two orthogonal directions without grating couplers.