Linked from
The 33 pages that link to Optical fiber, each with the reason it gives.
Refractive indexRelated: A higher-index core confines light relative to its surrounding cladding.
GlassRelated: Highly purified glass transmits signals with very low optical loss.
Silicon dioxideRelated: High-purity silica carries light over long distances with low signal loss.
Transverse waveRelated: It transports transverse electromagnetic modes through guided paths.
UlexiteRelated: Ulexite’s fibers behave like naturally occurring optical waveguides.