Analysis of dielectric waveguide bends and curved coupler structures using finite difference beam propagation method
Author(s)
Advisor
Altıntaş, AyhanDate
1997Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
In this thesis, implicit finite difference beam propagation method based on Crank Nicholson
discretization procedure is implemented and applied to the analysis
of propagation of optical beams in an orthogonal bend and a curved coupler
structure. The efficiency factor which accounts for the power loss as a result of
the bend is calculated for different waveguide width values and compiired with
analytic solutions in the analysis of the orthogonal bend. Also, the effect of
the rotation of the etched semiconductor-air interface from its ideal position is
examined. In the curved coupler analysis, the bend loss and the variation of
lower transfer ratios for different values of minimum distance that separates the
branches of the structure are investigated and compared with analytic solutions.
On both structure, the evolution of the Gaussian beam in the positive ^-direction
is obtained.
Keywords
Beam Propagation MethodPhotonic Integrated Circuits
Waveguide Couplers
Optical Waveguide Bends