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Visible light communication (VLC) is a promising technique to provide connectivity to users while providing illumination. To further improve the data rates of VLC systems, multiple sources that transmit multiple simultaneous data streams can be used. This Letter proposes a novel mixture model for VLC systems that make use of multiple sources to provide sufficient flexibility to accurately model the received signal levels for enabling better system designs. The validity of the proposed model is empirically verified through a set of real‐life measurements. [ABSTRACT FROM AUTHOR]

A 4:1 multiplexer (MUX) circuit in SiGe BiCMOS technology intended to directly drive a plasmonic Mach–Zehnder modulator for transmitter applications is presented. To achieve the highest data rates at a high output voltage swing, a power MUX concept is applied that maps the high‐speed performance of the final clock signal onto the output data. In the clock tree a novel wideband 90° clock phase shifter circuit is utilised for timing adjustment and frequency doubling. Electrical measurements of the chip demonstrate open eye diagrams for non‐return‐to‐zero on‐off‐keying (NRZ‐OOK) signals up to 180 Gbit/s, which is record speed for Si‐based technologies. A differential output voltage swing of 300mVpp was measured that corresponds to an output voltage swing of more than 1Vpp without the bandwidth limit of the measurement equipment. [ABSTRACT FROM AUTHOR]

A silicon–germanium BiCMOS E‐band power amplifier (PA) for millimetre‐waves for Gbit/s data rates in fifth‐generation cellular wireless backhaul networks is presented. A 69–78 GHz transmission‐line PA is demonstrated by integrating an electrostatic discharge (ESD) and a power detector together. To save this area, a transmission‐line‐based power coupler is shared by the ESD and the power detector. The ESD achieves an insertion loss of <1.5 dB in the frequency range of 17–100 GHz. The linear‐in‐dB output characteristic of the power detector is achieved by an exponential voltage convertor. The designed PA measured a maximum gain of 18.6 dB with 3 dB bandwidth of 68.9–78.7 GHz. The input return loss is better than −10 dB from 50 to 81 GHz. It delivers 10 dBm saturated output power at 73.4 GHz. Transmission line pulsing (TLP) measurement result shows that the voltage is clamped below 6 V even under 10 A ESD current. [ABSTRACT FROM AUTHOR]

Canonical logic units (CLUs) are basic building blocks for complex all‐optical logic operations, and multicast of CLUs can improve the computing capacity and operating flexibility. The authors thus propose and experimentally demonstrate all‐optical reconfigurable multicast two‐input CLUs (i.e. minterms) at 40 Gb/s by using four‐wave mixing in a single highly non‐linear fibre. Each type of CLUs with clear temporal waveform and wide eye opening is achieved in five parallel channels simultaneously. The extinction ratios are >10.3 dB, while the optical signal‐to‐noise ratios are >21 dB. Based on the demonstrated scheme, a method of realising simultaneous full set of two‐input logic operations is proposed and discussed. The proposed scheme can be extended to higher data rates and transferred to on‐chip platforms. [ABSTRACT FROM AUTHOR]