Jingli Wang, Haiguang Liu, Yueteng Zhang, Yuchen Song, Hanxiao Shen, Heming Chen. Directional Coupler-Based Polarization-Independent Demultiplexer Filled with SiNx[J]. Acta Optica Sinica, 2022, 42(19): 1923002
- Acta Optica Sinica
- Vol. 42, Issue 19, 1923002 (2022)
![Polarization independent DC waveguides based on SWG structure[18-19]. (a) Structure in Ref. [18]; (b) structure in Ref. [19]](/richHtml/gxxb/2022/42/19/1923002/img_01.jpg)
Fig. 1. Polarization independent DC waveguides based on SWG structure[18-19]. (a) Structure in Ref. [18]; (b) structure in Ref. [19]
Fig. 2. Diagrams of SWG structure and equivalent uniform refractive index medium. (a) Diagram of SWG structure; (b) diagram of equivalent uniform refractive index medium
Fig. 3. Configuration of DC demultiplexer structure (inset is section view of coupled zone waveguide)
Fig. 4. Lc as a function of n(SiNx) when g is 120 nm and
Fig. 5. g as a function of n(SiNx) when demultiplexer is polarization-independent
Fig. 6. Lc and R of 1550 nm and 1310 nm optical signals as functions of g when demultiplexer is polarization-independent, and L as a function of R when m is less than 7. (a) Lc as a function of g; (b) R as a function of g; (c) L as a function of R
Fig. 7.
Fig. 8.
Fig. 9. Field distributions of DC polarization-independent demultiplexer. (a) 1310 nm, TE polarization mode; (b) 1310 nm, TM polarization mode; (c) 1550 nm, TE polarization mode; (d) 1550 nm, TM polarization mode
Fig. 10. Normalized output power and
Fig. 11.
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Table 1. Comparison of performance parameters of polarization-independent demultiplexers
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