Abstract

Multimode dielectric or metallic waveguides have the property that a narrow beam launched into the waveguide does not randomly disperse, but forms repetitive cohesive patterns at certain points along the axis of the guide. This imaging property is the result of constructive interference between modes, and is mathematically related to the hybrid ray-mode formulations of Felsen and his colleagues. This paper will review the origins and applications of the imaging properties of uniformly filled metallic or dielectric waveguides.

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