Fig. 4: Multichannel real-time videos transmission results.
From: Integrated photonics enabling ultra-wideband fibre–wireless communication
a, Schematic of the multi-user-access system. The entire system can be divided into four subsystems: Tx switch network, optical-to-THz conversion network, THz-to-optical conversion network and Rx switch network. BPF, band-pass filter; DEMUX, demultiplexer; MUX, multiplexer; MUTC-PD, modified UTC-PD; PC, polarization controller. b, Proof-of-concept demonstration of multichannel real-time videos transmission. Each video represents an individual server/client allocated to the corresponding channel from 138 to 223 GHz with 1-GHz bandwidth. The aggregated optical spectrum shows the received signal spectrum for each channel. Insets, directly measured integrated photonics system response (top) and normalized system response extracted from the whole links (bottom). c, Proof-of-concept demonstration of parallel real-time videos transmission. Left, photograph of the experimental set-up. Right, optical spectrum of the received videos signals. The imbalance of the received power between two channels mainly results from the power disparities of the original Tx signals.
