Optical communications

TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.

TL;DR: This paper proposes a physical-layer network coding (PNC) scheme to coordinate transmissions among nodes that makes use of the additive nature of simultaneously arriving electromagnetic (EM) waves for equivalent coding operation and demonstrates its potential for boosting network capacity.

TL;DR: This survey provides the reader with comprehensive details on the use of space-based optical backhaul links in order to provide high capacity and low cost backhaul solutions.

TL;DR: In this paper, a sixmode universal system consisting of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip was demonstrated.

TL;DR: This survey provides the reader with comprehensive details on the use of space-based optical backhaul links in order to provide high capacity and low cost backhaul solutions.

TL;DR: In this paper, a sixmode universal system consisting of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip was demonstrated.

TL;DR: In this paper, the performance of optical amplifiers and a wideband optical filter is evaluated in the presence of spontaneous noise and photodetector shot noise and compared with those predicted by Gaussian approximations for amplitude shift keying (ASK), Frequency Shift Kening (FSK), or differential phase shift keening (DPSK) modulations.

TL;DR: In this paper, the recovery of superconducting NbN-nanowire photon counters after detection of an optical pulse at a wavelength of 1550nm was investigated, and the reset time was found to be limited by the large kinetic inductance of these nanowires.