Open AccessProposal of a wavelength filter with a cut corner based on Equilateral-Triangle-Resonator
Author(s) -
Wei-Cong Yan,
Zhiyou Guo,
Ning Hua Zhu,
Yu-Qiang Jiang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.016536
Subject(s) - equilateral triangle , optics , resonator , finesse , waveguide , isosceles triangle , filter (signal processing) , physics , waveguide filter , wavelength , mathematics , filter design , computer science , prototype filter , geometry , fabry–pérot interferometer , computer vision
We propose an equilateral triangle resonator filter with an output waveguide and analyzed by the finite-difference time-domain technique. The filter can realize directional output with a high Q mode by means of the mode-field coupled into the output waveguide, which results a reduction in the scattering loss at the vertices. In addition, to the deformed equilateral triangle resonator filter, an optimum parameter with a cut corner of 0.23 μm, which is equal to that of the input waveguide and can be an optimal cut, is found to help increase in finesse, Q factors, extinction ratio and the output intensity on resonance of the drop port normalized with the through port .