Frequency Up-Conversion of Data-Carrying Optical Vortex for Optical Fibre to Optical Wireless Communications Interface

Frequency up-conversion of data-carrying Gaussian and OAM beams are experimentally demonstrated with preserved 10.6-Gb/s data modulation from 1564nm to 782nm through SHG in PPLN, providing a high-speed-data preserved frequency bridge from optical fibre to optical wireless communications.