A coupled power theorem is developed which is applied to radial line (disk) optical dielectric waveguides. This theorem is utilized to develop transverse-electric and transverse-magnetic orthogonality relations for modes propagating in perfect disk guides. Because azimuthal variation is easily controlled, the disk guide can be employed as a device for coupling energy from a single source to a large number of optical fiber guides.
© 1978 Optical Society of America
Nicolaos G. Alexopoulos and Stephen R. Kerner, "Coupled power theorem and orthogonality relations for optical disk waveguides," J. Opt. Soc. Am. 67, 1634-1638 (1977)