| Project/Area Number |
62550272
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
電子機器工学
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| Research Institution | Hokkaido University |
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Principal Investigator |
KOSHIBA Masanori Faculty of Engineering, Hokkaido University, 工学部, 教授 (40101521)
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| Co-Investigator(Kenkyū-buntansha) |
KITAZAWA Toshihide Faculty of Engineering, Kitami Institute of Technology, 工学部, 助教授 (50133806)
HAYATA Kazuya Faculty of Engineering, Hokkaido University, 工学部, 助手 (80173053)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1988: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1987: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Periodic Structure / Optical Grating / Surface-Acoustic-Wave Grating / Finite-Element Method / Boundary-Element Method / Coupled Mode Theory / Equivalent Network Theory / スプリアス解 / 有効要素法 / グレーティング形フィルタ / グレーティング形反射器 / グレーティング形共振器 / 光集積回路 / 光と音波の相互作用 |
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| Research Abstract |
The purpose of this project is to develop an optimum design system of periodic structures, i.e. gratings for lightwaves and surface acoustic waves. This system is based on the finite-element method and/or the boundary-element method which may be easily applied to various gratings composed of inhomogeneous, anisotropic, active, and lossy media. Results obtained are as follows:
1. A numerical approach based on the finite-element method was developed for the analysis of dispersion characteristics of optical gratings and surface-acousticwave gratings, for periodically perturbed three-dimensional electromagnetic waveguides, an improved finite-element method without spurious solutions was developed.
2. A numerical approach based on the finite-element method was developed for the analysis of finite periodic waveguides for light waves and surface acoustic waves. To treat a large structure in which a repetition of complicated components arises, the substructure method was introduced.
3. A numerical approach based on teh finite-element method or the boundary-element method was developed for the analysis of diffraction characteristics of optical gratings. For the metallic gratings, the validity of the surface impedance and perfect conductor approximations was checked.
4. A method of determining the coupling coefficients of coupled mode theory and the circuit parameters of equivalent network theory for gratings was developed with the help of the finite-element method.
5. A combined method, using the finite-element approach and the boundary-element approach, was developed for the analysis of arbitrarily shaped discontinuities in an open dielectric slab waveguide.
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