Grating Coupler/Demultiplexer For Fibre-Optic Local-Area Networks Using Wavelength-Division Multiplexing

1986 ◽  
Author(s):  
Torsten von Lingelsheim
Keyword(s):  
Wavelength Division Multiplexing ◽  
Local Area Networks ◽  
Local Area ◽  
Grating Coupler ◽  
Fibre Optic ◽  
Wavelength Division

Robust wavelength division multiplexed local area networks

1997 ◽  
Vol 16 (3) ◽  
pp. 237-260 ◽  
Author(s):  
Tarek S. El-Bawab ◽  
Chintan H. Vaishnav ◽  
Anura P. Jayasumana ◽  
Henryk Temkin ◽  
Jon R. Sauer ◽  
...  
Keyword(s):  
Local Area Networks ◽  
Local Area ◽  
Wavelength Division ◽  
Wavelength Division Multiplexed

Multimode 200-GHz-spaced dense wavelength division demultiplexing for local area networks

2001 ◽  
Author(s):  
Jie Qiao ◽  
Feng Zhao ◽  
Jizuo Zou ◽  
Ray T. Chen ◽  
William W. Morey ◽  
...  
Keyword(s):  
Local Area Networks ◽  
Local Area ◽  
Wavelength Division

scholarly journals Efficiency Enhanced Grating Coupler for Perfectly Vertical Fiber-to-Chip Coupling

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2681 ◽  
Author(s):  
Zan Zhang ◽  
Xiaotao Shan ◽  
Beiju Huang ◽  
Zanyun Zhang ◽  
Chuantong Cheng ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Coupling Efficiency ◽  
Optical Power ◽  
Wide Band ◽  
Cost Effective ◽  
Grating Coupler ◽  
Wavelength Division ◽  
Si3n4 Layer ◽  
Vertical Coupling ◽  
193 Nm

In this work, a bidirectional grating coupler for perfectly vertical coupling is proposed. The coupling efficiency is enhanced using a silicon nitride (Si3N4) layer above a uniform grating. In the presence of Si3N4 layer, the back-reflected optical power into the fiber is diminished and coupling into the waveguide is increased. Genetic algorithm (GA) is used to optimize the grating and Si3N4 layer simultaneously. The optimal design obtained from GA shows that the average in-plane coupling efficiency is enhanced from about 57.5% (−2.5 dB) to 68.5% (−1.65 dB), meanwhile the average back-reflection in the C band is reduced from 17.6% (−7.5 dB) to 7.4% (−11.3 dB). With the help of a backside metal mirror, the average coupling efficiency and peak coupling efficiency are further increased to 87% (−0.6 dB) and 89.4% (−0.49 dB). The minimum feature size of the designed device is 266 nm, which makes our design easy to fabricate through 193 nm deep-UV lithography and lowers the fabrication cost. In addition, the coupler proposed here shows a wide-band character with a 1-dB bandwidth of 64 nm and 3-dB bandwidth of 96 nm. Such a grating coupler design can provide an efficient and cost-effective solution for vertical fiber-to-chip optical coupling of a Wavelength Division Multiplexing (WDM) application.

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