Jing-Li Wang, Zi-Yu Chen, He-Ming Chen. Design of polarization-insensitive 1 × 2 multimode interference demultiplexer based on Si3N4/SiNx/Si3N4 sandwiched structure [J]. Acta Physica Sinica, 2020, 69(5): 054206-1
- Acta Physica Sinica
- Vol. 69, Issue 5, 054206-1 (2020)
Fig. 1. (a) Schematic configuration of the sandwiched structure; field distributions for the (b) quasi-TE and (c) quasi-TM fundamental mode in a sandwiched waveguide (
).
). 
Fig. 2. Schematic configuration of the demultiplexer structure: (a) Top view; (b) cross section of the MMI waveguide.
Fig. 3. Beat length
as a function of n (SiNx ) when the MMI width W MMI is: (a) 3 µm; (b) 4 µm; (c) 5 µm.
as a function of Fig. 4. n (SiNx ) as functions of W MMI when the demultiplexer is polarization-insensitive.
Fig. 5. (a)
and (b) M as functions of W MMI when the demultiplexer is polarization-insensitive.
and (b) Fig. 6. R as functions of W MMI.
Fig. 7. Field distributions of the MMI demultiplexer: (a) Quasi-TE mode, at 1310 nm; (b) quasi-TM mode, at 1310 nm; (c) quasi-TE mode, at 1550 nm; (d) quasi-TM mode, at 1550 nm.
Fig. 8. Output powers (normalized to the input power) from Port2 and Port3 as the wavelength varies: (a) 1310 nm band; (b) 1550 nm band.
Fig. 9. Performance parameters as functions of L MMI: (a) IL; (b) CT.
Fig. 10. Performance of parameters as functions of h (SiNx ): (a) IL; (b) CT.
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Table 1.
Performances of the MMI demultiplexer.
MMI型解复用器的性能参数
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Table 2.
Performances of the MMI demultiplexer when input and output waveguides are straight.
输入、输出波导均为直波导时的MMI型解复用器的性能参数
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