I. Positive (normal) dispersion. This is what happens in most light-matter interaction. The medium has higher index of refraction for higher frequencies; the frequency components of a pulse are ...

Mode-division multiplexing based on few-mode optical fiber is a promising technology to increase the transmission capacity of ...

A nano-sized bar of glass encased in silver allows visible light to pass through at near infinite speed. The technique may spur advances in optical computing. In a vacuum the refractive index is 1, ...