What are the light sources that transmit signals in optical fiber communication cables

Fiber optic transmitters convert electrical signals into optical signals and then inject these optical signals into light- conducting cable. They use light emitting diodes (LED) or laser diodes as their optical source, and are designed for use with either single-mode or multi-mode. The four main types of optical sources are LEDs, Fabry-Perot (FP) lasers, Distributed Feedback (DFB) lasers, and Vertical Cavity Surface-Emitting Lasers (VCSELs). LEDs are tiny semiconductor devices. Fiber-optic communication systems require a light source to generate the signal that the fiber transmits. [pdf]

Energy-saving cost of handheld light sources for smart buildings

Energy savings of between 35 and 70 per cent on total lighting costs can be achieved with intelligent illumination. The convergence of building information modeling (BIM). Buildings are responsible for approximately 40% of global energy consumption, putting pressure on the construction industry to mitigate its environmental impact. According to ASSIL (the Italian Association of Lighting Manufacturers), the use of intelligent lighting can cut energy. This study conducts a scoping review of energy-saving research on smart lighting systems in office buildings to determine the field's scope, the primary technologies and methods employed, specific energy-saving outcomes, and existing research gaps. An efficient lighting-controlling system can significantly reduce the mentioned costs. [pdf]