Beam splitter based on Bragg grating-assisted coupler
We describe a compact beam splitter based on grating-assisted coupler which consists of Bragg grating sandwiched between two parallel waveguides on the silicon-on-insulator platform. The coupled-mode theory is an important method to analyze waveguide structure. The coupling effect is affected by the...
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| Published in: | Chinese optics letters Vol. 13; no. 13; pp. 86 - 89 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
30-01-2015
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | We describe a compact beam splitter based on grating-assisted coupler which consists of Bragg grating sandwiched between two parallel waveguides on the silicon-on-insulator platform. The coupled-mode theory is an important method to analyze waveguide structure. The coupling effect is affected by the grating refractive index perturbation due to the phase mismatch between two waveguides with different widths and refractive indices. The power difference between the transmitting and the reflecting directions in waveguide A is nearly 0 when the Bragg wavelength is 1.3464μm, the index perturbation is 0.245, the period of grating is 0.2 μm, and the distance of two waveguides is 1μm. At this time, cross couple neighbor waveguides are significantly suppressed. Beam splitter based on grating-assisted coupler is very useful in integrated optical circuits and photonic network-on-chip. |
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| Bibliography: | 31-1890/O3 We describe a compact beam splitter based on grating-assisted coupler which consists of Bragg grating sandwiched between two parallel waveguides on the silicon-on-insulator platform. The coupled-mode theory is an important method to analyze waveguide structure. The coupling effect is affected by the grating refractive index perturbation due to the phase mismatch between two waveguides with different widths and refractive indices. The power difference between the transmitting and the reflecting directions in waveguide A is nearly 0 when the Bragg wavelength is 1.3464μm, the index perturbation is 0.245, the period of grating is 0.2 μm, and the distance of two waveguides is 1μm. At this time, cross couple neighbor waveguides are significantly suppressed. Beam splitter based on grating-assisted coupler is very useful in integrated optical circuits and photonic network-on-chip. Junbo Yang, Jingjing Zhang, Shuzhi Xu, Shengli Chang（ 1.Center of Material Science, National University of Defense Technology, Changsha 410073, China ;2.State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University, Beijing 100871, China） |
| ISSN: | 1671-7694 |
| DOI: | 10.3788/COL201513.S12501 |