![Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers](https://www.spiedigitallibrary.org/ContentImages/Journals/OPEGAR/51/9/094603/WebImages/OE_51_9_094603_f005.png)
Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers
![Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers](https://www.spiedigitallibrary.org/ContentImages/Journals/OPEGAR/51/9/094603/FigureImages/OE_51_9_094603_f007.png)
Design and analysis of optical coupler with a stable splitting ratio based on cascaded multistage directional couplers
![An unfilled gap in a directional coupler between two waveguides, due to... | Download Scientific Diagram An unfilled gap in a directional coupler between two waveguides, due to... | Download Scientific Diagram](https://www.researchgate.net/profile/Andrea_Melloni/publication/267795977/figure/fig4/AS:373178284167170@1465984044451/An-unfilled-gap-in-a-directional-coupler-between-two-waveguides-due-to-faulty-PECVD.png)
An unfilled gap in a directional coupler between two waveguides, due to... | Download Scientific Diagram
![Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram](https://www.researchgate.net/profile/Xiaoyan_Zhou7/publication/332529382/figure/fig1/AS:750422981611521@1555926189231/Fig-S1-Numerical-analysis-of-a-gap-variable-directional-coupler-a-Propagation_Q320.jpg)
Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram
![Figure 3 from A monolithic low-cost 3-dB directional coupler based on silicon image guide (SIG) technology at millimeter-wave band | Semantic Scholar Figure 3 from A monolithic low-cost 3-dB directional coupler based on silicon image guide (SIG) technology at millimeter-wave band | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/f4dafb288722ad89b8c6dc39587bc18694ba9920/2-Figure3-1.png)
Figure 3 from A monolithic low-cost 3-dB directional coupler based on silicon image guide (SIG) technology at millimeter-wave band | Semantic Scholar
![Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram](https://www.researchgate.net/profile/Xiaoyan_Zhou7/publication/332529382/figure/fig1/AS:750422981611521@1555926189231/Fig-S1-Numerical-analysis-of-a-gap-variable-directional-coupler-a-Propagation.png)