Optical waveguide and Optical fiber

Optical fiber and optical waveguide are semantically related in light guide topic. In some cases you can use "Optical fiber" instead a noun "Optical waveguide".

Optical fiber noun - A very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images.

Optical waveguide and optical fiber are semantically related in light guide topic. You can use "Optical waveguide" instead a noun phrase "Optical fiber".