Optical path and Optical waveguide

Optical waveguide and optical path are semantically related in optical fiber topic. In some cases you can use "Optical waveguide" instead a noun "Optical path", when it comes to topics like optical fibre.

Optical path and optical waveguide are semantically related in optical fiber topic. You can use "Optical path" instead a noun "Optical waveguide", if it concerns topics such as optical fibre.