We have implemented numerically simulate of directional coupler that based on the
finite element method using COMSOL Multiphysics software. The distributions of electric
field and power flow of light propagates in two cores of directional coupler were analyzed. The
results showed the dependencies of coupling length and maximum transfer power between
cores on the cores separation and the wavelength, the characteristic of a subwavelength
directional coupler can be used for photonic integrated circuits. We have also designed
asymmetric directional coupler by changing in the device dimension, as the core width, the
variation of coupling length with the core width were analyzed, we found to reduce in the
power switching between cores when introducing a small difference in the one core width of
directional coupler, followed increased in the coupling length. At the same time, the coupling
length can be decreased efficiently by increasing the difference in one core width; therefore, a
directional coupler with large core width is more convenient to reduce the power switching
between cores than the smaller core width. This study is useful for determining the coupling
characteristics between the cores that maybe is used as a platform for future photonic
integrated circuits in optical communication systems
Publication Date
12/5/2021
Publisher
International Conference Computational Methods in Engineering Science- CMES’21, International Conference of Computational Methods in Engineering Science, CMES’21, Zamość, Poland (November 2021
ا.م .د. ميامي عبد اللطيف محمد | Asst. Prof. Dr. Miami Abdulatteef Mohammad | 4575