Optical communications hardware and components; digital signal processing (DSP) technology; silicon photonics (SiPh) and heterogeneous integrated SiPh photonic components and systems for use in optical communication networks, namely, optical transceivers, receivers, transmitters, and fiber-optic transceivers; optical and electronic communication instruments and devices for measuring, interrogating, transmitting, receiving, processing, and monitoring optical signals; integrated circuits, namel...