Title :
Analytical results for the confinement factor of antiguides
Author :
Buus, Jens ; Botez, Dan
Author_Institution :
Gayton Photonics Ltd., Gayton, UK
Abstract :
A dielectric waveguide with a core index lower than the cladding index can support guided modes if there is a sufficiently high gain in the core, in this letter, an analytical expression for the confinement factor (defined as the fraction of the intensity present in the core) for such antiguides is derived. Based on this result it is also shown that the number of modes in an antiguide increases super-linearly with the waveguide dimension, and a simple result for the scaling law is derived.
Keywords :
dielectric waveguides; optical waveguide theory; antiguides; cladding index; confinement factor; core; core index; dielectric waveguide; guided modes; high gain; intensity; scaling law; waveguide dimension; Dielectrics; Equations; Optical arrays; Optical waveguides; Phased arrays; Photonics; Power lasers; Propagation losses; Semiconductor laser arrays; Semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
