2003 Fiscal Year Final Research Report Summary
Studies on characteristics of optical add/drop multiplexer using an asymmetric grating coupler
| Project/Area Number |
14550389
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | Osaka Electro-Communication University |
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Principal Investigator |
MURAKAMI Yasuji Osaka Electro-Communication University, Faculty of engineering, Professor, 工学部, 教授 (30330153)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Add / Drop optical multiplexer / grating coupler / optical fiber coupler |
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| Research Abstract |
In the project, we proposed a new structure of optical add/drop multiplexer for use of optical routers in photonic networks and tried to study the optical characteristics of devices produced by way of experiment. Summary of research results, which we studied in this project, is as follows :
(1)Optical add/drop multiplexer, which we studied, has a directional coupler structure with periodic refractive index changes. Optical power with a specific wavelength is added or dropped in this device. In this project, we proposed a new structure, and clarified the characteristics by both theoretical investigations and numerical calculations.
(2)We tried to produce the new structure of optical add/drop multiplexer, which we theoretically studied, by way of experiment. Method for trial production is polishing of the side faces of optical grating fibers. We are now going on, and did not finish the studies. However, we found conditions for polishing, by which we can get uniform polishing side faces with reproduction.
Detailed results are as follows :
1.100% coupling efficiency is obtained between even mode and odd mode in the asymmetric grating coupler.
2.More than 90% refection efficiency is obtained for specific parameters in symmetric grating coupler, which has not yet been reported.
3.The new optical coupler proposed is hopeful for realization of small size optical multiplexers.
4.It is difficult to control polishing faces precisely in optical fibers. More studies, are needed to produce the optical fiber grating coupler by way of experiment.
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Research Products
(2 results)
