Germanium is commonly doped into optical fibers (Ge-doped SiO₂) to enhance their refractive index and transmission efficiency. Although silicon is the most common semiconductor today, germanium still plays a key role in several specialized applications. Germanium has some unique properties. 2 billion global FTTH subscribers by 2025. Germanium is mostly used in fibre optics and is an essential component in all modern communication technology however, for a long time, Germanium was the leading material in electronics. This article will discuss the key applications, advantages, and challenges of germanium in various fields.
