2007 Fiscal Year Final Research Report Summary
Three-dimensional self-organized optical wiring networks and their applications to integrated optical interconnects/switching systems
| Project/Area Number |
17560037
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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 |
Applied optics/Quantum optical engineering
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| Research Institution | Tokyo University of Technology |
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Principal Investigator |
YOSHIMURA Tetsuzo Tokyo University of Technology, Department of Electronics, Professor (50339769)
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| Co-Investigator(Kenkyū-buntansha) |
ASAMA Kunihiko Tokyo University of Technology, Department of Electronics, Professor (10277882)
KUROKAWA Hiroaki Tokyo University of Technology, Department of Electronics, Lecturer (20308282)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Self-organized / three-dimensional / optical circuits / optical interconnects / optical switching |
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| Research Abstract |
In order to reduce loss arising from misalignment between stacked optical waveguide films at optical z-connections, and to reduce cost for vertical waveguide construction, we proposed three-dimensional self-organized optical wiring networks for optical interconnects within computers, where, the reflective self-organized lightwave network(R-SOLNET) is implemented. The following results were obtained.
1. We developed the FDTD-based SOLNET simulator, and simulated R-SOLNET formation between a 2-um-wide optical waveguide and a 0.5-um-wide optical waveguide with a wavelength filter on its core edge. Due to the pulling water effect induced by the wavelength filter that reflects write beams introduced from the 2-um-wide optical waveguide, SOLNET was guided to the wavelength filter site to construct a self-aligned coupling waveguide between the two optical waveguides. Furthermore, by placing two wavelength filters, a Y-branch optical waveguide was self-organized.
2. A multimode optical fiber and
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an optical fiber with an Al mirror on the edge were placed with a gap filled with photo-polymer. When write beams of 365 nm in wavelength were emitted from the multimode optical fiber, R-SOLNET was constructed between the two optical fibers even when angular misalignment of 3 degrees or offset of 30 nm exists between them. The results provide the proof-of-concept for R-SOLNET experimentally.
3. We constructed three-dimensional optical circuits by stacking optical waveguide films with 45°mirrors, and observed three-dimensional light propagation in the films through optical z-connections.
4. SOLNET was formed vertically on 45°mirror site when reflected 405-nm-blue-LD light beams were introduced into a photo-polymer layer on a cladding film of an optical waveguide film. The SOLNET was found to act as a vertical waveguide.
5. We proposed an optical waveguide films with 45°mirrors having skirt-type 3-layer core structures. BPM/FDTD simulations and optical waveguide fabrication experiments by the built-in mask method revealed that the proposed structure is effective for beam leakage/scattering reduction at the 45°mirrors.
By the present research core technologies for the three-dimensional self-organized optical wiring networks have been established. In future challenges, whole system construction will be carried out by combining these core technologies. Less
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Research Products
(42 results)
