An all-dielectric coaxial waveguide

An all-dielectric coaxial waveguide that can overcome problems of polarizat ion rotation and pulse broadening in the transmission of optical Light is p resented here. It consists of a coaxial waveguiding region with a Low index of refraction, bounded by two cylindrical, dielectric, multilayer, omnidir ectional reflecting mirrors. The waveguide can be designed to support a sin gle mode whose properties are very similar to the unique transverse electro magnetic mode of a traditional metallic coaxial cable. The new mode has rad ial symmetry and a point of zero dispersion. Moreover, because the Light is not confined by total internal reflection, the waveguide can guide Light a round very sharp corners.