Glass is a key material in optics and, in particular, in optical fibers, as they are usually made of silica, the most abundant mineral found on the surface of the Earth. In this post, we are going to focus on the properties of glass. In the first place, we will answer if glass is a solid or a liquid and describe how it is obtained, including some important concepts as the glass transition. Then, it will be explained why glass is used in optical fibers, as well as the main types of glass optical fibers.
