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Updated: May 8, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Proposal of a wavelength filter with a cut corner based on Equilateral-Triangle-Resonator
Wei-Cong Yan1, Zhi-You Guo, Ning Zhu
1Laboratory of Nanophotonic Functional Materials and Devices, Institute of Optoelectronic Material and Technology, South China Normal University, Guangzhou 510631, China.
Abstract:
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 .
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