Title :
Evanescent wave coupling of whispering gallery modes of a dielectric cylinder
Author :
Rowland, D.R. ; Love, J.D.
Author_Institution :
Opt. Sci. Centre, Inst. of Adv. Studies, Australian Nat. Univ., Canberra, ACT, Australia
fDate :
6/1/1993 12:00:00 AM
Abstract :
By developing a direct correspondence between a given whispering gallery mode of a dielectric cylinder and a mode of an equivalent waveguide ring resonator, the evanescent wave coupling characteristics of such modes can be simply modelled. This also allows the conditions for resonant excitation of a single whispering gallery mode to be determined. The model needs a coupled mode theory which accurately describes the coupling between a straight waveguide and a curved waveguide to be developed. This theory is checked against BPM results
Keywords :
optical couplers; optical waveguide theory; BPM results; beam propagation methods; coupled mode theory; curved waveguide; dielectric cylinder; equivalent waveguide ring resonator; evanescent wave coupling characteristics; resonant excitation; straight waveguide; whispering gallery modes;
Journal_Title :
Optoelectronics, IEE Proceedings J
