Title :
Relation between transition loss and mode-field half-width for curved noncircular weakly-guiding single-mode waveguides
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
fDate :
11/1/1995 12:00:00 AM
Abstract :
The relation between the transition loss and the near-field second-moment mode-field half-width WT1, Wy1 for curved arbitrary noncircular weakly-guiding single-mode waveguides is derived. For symmetric noncircular single-mode waveguides, under an elliptical Gaussian approximation, we also derive the beam shifts. We find that the formula for the transition loss is the same as the formula of the transverse offset loss, and the formulas of beam shifts and transition loss are reduced to the formulas of Gambling et al. for circular single-mode fibers
Keywords :
approximation theory; integrated optics; optical losses; optical waveguide theory; refractive index; beam shifts; circular single-mode fibers; curved arbitrary noncircular weakly-guiding single-mode waveguides; curved noncircular weakly-guiding single-mode waveguides; elliptical Gaussian approximation; mode-field half-width; near-field second-moment mode-field half-width; symmetric noncircular single-mode waveguides; transition loss; Integrated optics; Optical fiber communication; Optical fiber losses; Optical fiber polarization; Optical fiber sensors; Optical losses; Optical waveguides; Planar waveguides; Silicon compounds; Waveguide transitions;
Journal_Title :
Quantum Electronics, IEEE Journal of
