TY - JOUR
T1 - Design and investigation of a dual-layer grating coupler for efficient vertical fiber-chip coupling
AU - Yu, Jiyao
AU - Yamada, Hirohito
PY - 2019/1/1
Y1 - 2019/1/1
N2 - A novel dual-layer grating coupler was designed for efficient vertical coupling between a single-mode fiber and silicon nanowires, with characteristics of polarization diversity and both wavelength bands of 1.3 and 1.55 μm. Theoretical analysis and two-dimensional finite-difference time-domain simulations were applied to verify the performance of the design. Optimized results show that the coupling efficiencies of a dual-port output of 41% (-3.87 dB) for transverse-electric polarization at 1.56 μm, 32.88% (-4.83 dB) for transverse-magnetic (TM) polarization at 1.58 μm, and 27.06% (-5.68 dB) for TM polarization at 1.32 μm can be achieved. Dual-layer Fabry-Perot resonance was also investigated for high coupling efficiency.
AB - A novel dual-layer grating coupler was designed for efficient vertical coupling between a single-mode fiber and silicon nanowires, with characteristics of polarization diversity and both wavelength bands of 1.3 and 1.55 μm. Theoretical analysis and two-dimensional finite-difference time-domain simulations were applied to verify the performance of the design. Optimized results show that the coupling efficiencies of a dual-port output of 41% (-3.87 dB) for transverse-electric polarization at 1.56 μm, 32.88% (-4.83 dB) for transverse-magnetic (TM) polarization at 1.58 μm, and 27.06% (-5.68 dB) for TM polarization at 1.32 μm can be achieved. Dual-layer Fabry-Perot resonance was also investigated for high coupling efficiency.
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U2 - 10.7567/1882-0786/aaf21f
DO - 10.7567/1882-0786/aaf21f
M3 - Article
AN - SCOPUS:85059831061
VL - 12
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 1
M1 - 012004
ER -