Ultra-compact wideband filter with sidelobe suppression based on double modulated grating-assisted microring resonator
Fang C. Shrestha V.R. Ukaegbu I.A. Ren G. Pan S. Nakarmi B.
15 April 2022
Optics Continuum
2022#1Issue 4623 - 632 pp.
In this paper, we propose an ultra-compact wideband filter (WBF) with high sidelobe suppression. The filter consists of a single microring resonator incorporated with a proposed new structure of double modulated subwavelength gratings. The double modulated subwavelength gratings are obtained via two different fill factors with the same period. The ultra-compact WBF achieved FSR-free, flat response with a 3 dB bandwidth of 1.0734 THz and a sidelobe suppression of 19.79 dB. In addition, a low insertion loss of <0.6 dB and a low in-band ripple of less than 0.2 dB were obtained. The filter has a compact device footprint of 380 µm2.
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College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China
School of Physics, The University of Melbourne, 3010, VIC, Australia
School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, Nur-Sultan, 010000, Kazakhstan
Integrated Photonics and Applications Center (InPAC), School of Engineering, RMIT University, Melbourne, 3001, VIC, Australia
College of Electronic and Information Engineering
School of Physics
School of Engineering and Digital Sciences
Integrated Photonics and Applications Center (InPAC)
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