KEYWORDS: Phased array optics, Spatial light modulators, Optical simulations, Phase modulation, Modulation, Beam steering, Near field optics, Monte Carlo methods, Computer simulations, Free space
Optical phased array provides a promising platform for multi-beam steering in optical bands. Here, we propose and demonstrate an effective multi-beam steering scheme employing a phase-only spatial light modulator. The beam orientations and beam amplitudes are both programmable in our proposal. With Huygens-Fresnel simulation, the fidelity value of ~0.998 and ~0.999 are evaluated corresponding to the case of random beam orientations and random beam amplitude ratios, respectively. Furthermore, up to 101-beam steering is experimentally observed, which is much higher than existed reports.
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