Options
1993
Journal Article
Title
Bidirectional eigenmode propagation for large refractive index steps
Abstract
The bidirectional eigenmode propagation (BEP) combines the advantages of the transfer-matrix method for propagation and the mode-matching method (satisfying Maxwell's boundary conditions) at longitudinal large discontinuities for forward and backward travelling eigenvalues including discretized radiation modes. The calculated examples include a grating-assisted codirectional coupler for which 20% radiation losses have been found, and a cleaved waveguide facet with 39% reflected intensity and recapture of radiation modes due to a taperlike structure. The BEP is applicable to various types of optical passive (directional coupler, butt-coupling, taper) and active (DBR-, DFB-, and VCSE-laser, detector) devices with large refractive index differences.
Keyword(s)
diffraction gratings
directional couplers
eigenvalues and eigenfunctions
integrated optics
optical couplers
optical losses
optical waveguide theory
refractive index
forward travelling eigenvalues
laser diodes
active laser devices
photodetectors
dbr lasers
dfb lasers
large refractive index steps
bidirectional eigenmode propagation
transfer-matrix method
mode-matching method
maxwell's boundary conditions
longitudinal large discontinuities
backward travelling eigenvalues
discretized radiation modes
grating-assisted codirectional coupler
radiation losses
cleaved waveguide facet
reflected intensity
taperlike structure
directional coupler
butt-coupling
taper
vcse-laser
large refractive index differences