optical fiber is a thin, cylindrical fiber made of glass or plastic, that is as small as one tenth of a human hair. A standard telecom optical fiber comprises three layers that are counted from the inside out as fiber core (diameter 8~10um) and cladding (diameter of 125um) as well as buffer layer (diameter 90um).Fiber core and cladding is composed of silica or Www.adsleema.com/2022/10/blog-post_28.html...