WANG Xiao-qian, MA Ke-zhen, ZHAO Yu, FENG Xin-lin, XUE Chen-yang, ZHANG Wen-dong, YAN Shu-bin. SOI Multi-ring Cascade Optic Resonator Filters[J]. Chinese Journal of Luminescence, 2013,34(5): 645-649
WANG Xiao-qian, MA Ke-zhen, ZHAO Yu, FENG Xin-lin, XUE Chen-yang, ZHANG Wen-dong, YAN Shu-bin. SOI Multi-ring Cascade Optic Resonator Filters[J]. Chinese Journal of Luminescence, 2013,34(5): 645-649 DOI: 10.3788/fgxb20133405.0645.
Based on Silicon on insulator(SOI) material and mature Micro-electro-mechanical systems (MEMS) technology
an optical waveguide cascaded resonator filter with high integration and small size was processed. The light field transmission characteristics and spectral response characteristics of multi-ring cascaded cavity were theoretically analyzed. Moreover
the relationship between different number of cascaded micro-ring and resonance spectrum roll-off verticality was also proved in experiment. When the waveguide width is 450 nm and radius is 5 m
the experimental results show that -3 dB response bandwidth of the 1st order
2nd order and 10th order filters spectral are 0.313
0.279 and 0.239 nm
which are consistent with the theoretical results. That means more cascaded rings result in flatter top resonance and higher roll-off vertical degree. Micro-ring and racetrack-shaped cascaded resonator filters were fabricated and the properties of transmission spectrum was also tested.
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