Wavelength tunable matched-pair Vernier multi-ring filters using 
derivative-free optimization algorithms

Mak, Jason C. C.; Xue, Tianyuan; Yong, Zheng; Poon, Joyce

doi:10.1109/JSTQE.2020.2975644

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Wavelength tunable matched-pair Vernier multi-ring filters using derivative-free optimization algorithms

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Poon, Joyce
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1109/JSTQE.2020.2975644
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Citation

Mak, J. C. C., Xue, T., Yong, Z., & Poon, J. (2020). Wavelength tunable matched-pair Vernier multi-ring filters using derivative-free optimization algorithms. IEEE Journal of Selected Topics in Quantum Electronics, 26(5): 5900212. doi:10.1109/JSTQE.2020.2975644.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1D05-3

Abstract

We demonstrate matched pairs of multi-ring Vernier filters that mutually suppress the out-of-band resonances resulting from the Vernier effect to increase the free-spectral range (FSR) while achieving high out-of-band extinction ratio. These filters can be aligned to any center wavelength within the Vernier FSR. Both the design methodology and alignment procedure rely on derivative-free optimization methods. We report on an O-band silicon microring optical filter achieving out-of-band extinction of -52 dB over an FSR >100 nm.