In-Fibre Diffraction Grating for Beam Steering Indoor Optical Wireless Communication

In-fibre diffraction based on 45° tilted fibre grating enables high-efficiency wavelength-controlled laser beam steering for indoor optical wireless communication with unique features of low-loss and seamless integration with existing fibre-to-home networks. In addition, ultrafast user localization (50 million scans per second) based on real-time wavelength monitoring is demonstrated.