Sub-aperture coherence method to realize ultra-high resolution laser beam deflection

A new phase controlled method is proposed to realize ultra-high resolution laser beam deflection on the physics of coherence between sub-apertures on one device of liquid crystal optical phased array (LC-OPA). Sub-apertures are electronically switchable and divided from a uniform device of LC-OPA. In the approach of sub-aperture coherence (SAC), numerical simulation results show the characteristics of far field including SAC steering step and angular width. Meanwhile, the method of SAC has also been verified by experiments showing a good agreement with the simulation results of ultra-high resolution beam deflection.