Article

Combination of beam propagation method and mode expansionpropagation method for bidirectional optical beam propagation analysis

Div. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo;
Journal of Lightwave Technology (impact factor: 2.78). 12/1998; 16(11):2040-2045. DOI:10.1109/50.730368 pp.2040-2045
Source: IEEE Xplore

ABSTRACT A combined method of the beam propagation method (BPM) and the mode expansion propagation method (MEPM) is proposed for the analysis of reflections of both transverse electric (TE) and transverse magnetic (TM) polarized waves in waveguiding structures containing longitudinal discontinuities. BPM based on the finite-element method (FEM) is applied to slowly varying regions and MEPM is applied only to regions including abrupt discontinuities. FEM is also utilized for evaluating the eigenmodes necessary for the MEPM analysis. To show the validity and usefulness of the present approach, numerical examples for a semiconductor laser facet with antireflection coating and an optical directional coupler are presented

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Keywords

antireflection coating
 
beam propagation method
 
eigenmodes necessary
 
finite-element method
 
longitudinal discontinuities
 
mode expansion propagation method
 
optical directional coupler
 
present approach
 
semiconductor laser facet
 
TE
 
transverse electric
 
transverse magnetic
 
varying regions
 
waveguiding structures