Design of High Efficiency Grating Coupler for Vertical Coupling
| Autor: | 韩明夫 Han Ming-fu, 武华 Wu Hua, 郭霞 Guo Xia |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Holographic grating business.industry Eigenmode expansion Physics::Optics Reflector (antenna) Output coupler Grating Distributed Bragg reflector Atomic and Molecular Physics and Optics law.invention Ultrasonic grating Optics law Blazed grating Physics::Accelerator Physics business Nonlinear Sciences::Pattern Formation and Solitons |
| Zdroj: | ACTA PHOTONICA SINICA. 42:777-781 |
| ISSN: | 1004-4213 |
| Popis: | A high-efficiency grating coupler is designed for vertical coupling between silicon-oninsulator waveguides and single-mode fibers.The reflection characteristics of reflector grating and distributed bragg reflector are employed to obtain a high reflection from the right side and bottom of the coupler.The reflected light is interfered destructively to reduce the negative second-order reflection by selecting a reasonable spacing between the reflector grating and the coupler grating when the coupler grating is in the vertical coupling.The coupler is optimized using eigenmode expansion-based simulations.The highest coupling efficiency of 89% at a wavelength 1 550nm is achieved by simulation.The results provide some useful references for the fabrication of the actual vertical coupling grating coupler. |
| Databáze: | OpenAIRE |
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