![Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram](https://www.researchgate.net/publication/320179646/figure/fig1/AS:631642368532512@1527606684404/Basic-structure-of-the-directional-coupler-with-zero-gap-and-large-gap-acting-as_Q320.jpg)
Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram
![a) Power coupling ratios in cross and through ports of the directional... | Download Scientific Diagram a) Power coupling ratios in cross and through ports of the directional... | Download Scientific Diagram](https://www.researchgate.net/profile/Hamed_Pishvai_Bazargani/publication/281326168/figure/fig4/AS:667719200436235@1536208071542/a-Power-coupling-ratios-in-cross-and-through-ports-of-the-directional-coupler-for-500.png)
a) Power coupling ratios in cross and through ports of the directional... | Download Scientific Diagram
![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
![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
![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)
Fig. S1. Numerical analysis of a gap-variable directional coupler. (a)... | Download Scientific Diagram
![Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram](https://www.researchgate.net/publication/320179646/figure/fig1/AS:631642368532512@1527606684404/Basic-structure-of-the-directional-coupler-with-zero-gap-and-large-gap-acting-as.png)
Basic structure of the directional coupler with zero gap and large gap... | Download Scientific Diagram
![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)