TY - GEN
T1 - On-Chip Double-Fano-Enabled Reconfigurable Optical Notch Filter for Microwave Signal Processing
AU - Hong, Xu
AU - Wang, Bin
AU - Zhang, Weifeng
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - We propose and demonstrate a fully reconfigurable optical notch filter enabled by on-chip double-Fano resonance. The double-Fano resonance is realized by interfering two independent Fano resonances, of which each one is produced using an add-drop micro-disk resonator and a Mach-Zehnder interferometer. Metal micro-heaters are placed on top of the waveguide to tune each Fano resonance including the resonance wavelength and line shape. When the resonance wavelengths of the two Fano resonances are close to each other and their line shapes have a mirror image, a symmetrical optical notch filter is resulted from the interference of the two asymmetrical Fano resonances. By controlling micro-heaters, the bandwidth, extinction ratio (ER), and center wavelength of the resulted notch filter can be fully tuned. A chip is designed, fabricated, and characterized. The results show that the notch filter has a tunable bandwidth from 46 to 76 pm, a tunable ER from 0 to 30 dB, and a tunable center wavelength from 1544 to 1547 nm, which holds great potential for microwave signal photonic processing.
AB - We propose and demonstrate a fully reconfigurable optical notch filter enabled by on-chip double-Fano resonance. The double-Fano resonance is realized by interfering two independent Fano resonances, of which each one is produced using an add-drop micro-disk resonator and a Mach-Zehnder interferometer. Metal micro-heaters are placed on top of the waveguide to tune each Fano resonance including the resonance wavelength and line shape. When the resonance wavelengths of the two Fano resonances are close to each other and their line shapes have a mirror image, a symmetrical optical notch filter is resulted from the interference of the two asymmetrical Fano resonances. By controlling micro-heaters, the bandwidth, extinction ratio (ER), and center wavelength of the resulted notch filter can be fully tuned. A chip is designed, fabricated, and characterized. The results show that the notch filter has a tunable bandwidth from 46 to 76 pm, a tunable ER from 0 to 30 dB, and a tunable center wavelength from 1544 to 1547 nm, which holds great potential for microwave signal photonic processing.
KW - Fano resonance
KW - double Fano resonances
KW - optical notch filter
KW - reconfigurability
KW - silicon photonic chip
UR - http://www.scopus.com/inward/record.url?scp=85185832023&partnerID=8YFLogxK
U2 - 10.1109/MWP58203.2023.10416599
DO - 10.1109/MWP58203.2023.10416599
M3 - Conference contribution
AN - SCOPUS:85185832023
T3 - 2023 International Topical Meeting on Microwave Photonics, MWP 2023 - Proceedings
BT - 2023 International Topical Meeting on Microwave Photonics, MWP 2023 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 International Topical Meeting on Microwave Photonics, MWP 2023
Y2 - 15 October 2023 through 18 October 2023
ER -