| Project/Area Number |
12555106
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
情報通信工学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAKUSHIMA Yuichi The University of Tokyo, Research Center for Advance Science and Technology, Associate Professor, 先端科学技術研究センター, 助教授 (10272585)
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| Co-Investigator(Kenkyū-buntansha) |
KATOH Kazuhiro Research Center for Advanced Science and Technology, The University of Tokyo, Research Associate, 先端科学技術研究センター, 助手 (00292897)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 2001: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2000: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | optical network / optical switch / nonlinear optics / optical soliton / dispersion monitor / super-continuum generation / multi-wavelength source / optical cross-connect |
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| Research Abstract |
Enabling technologies for ultra-high capacity backbone networks are divided into two categories ; high-capacity transmission technology and optical switching technology at network nodes. Among them, the recent progress in the wavelength-division multiplexing (WDM) technique have achieved the tremendous growth of the transmission capacity up to tera-bit/sec. On the other hand, in order to realize the ultra-high capacity network nodes various architectures of all-optical cross-connect (OXC) switches have been proposed, but they have crucial issues for practical use ; for example, the required optical hardware increases drastically with the size of the OXC node, the quality of the transmission signal can easily impaired in the OXC, and so on.
The aim of this study is to develop the technology platform of optical network nodes which can cope with the aforementioned difficulties and to demonstrate it experimentally. In the proposed architecture, only a multi-wavelength pulse source is used i
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n the network node and shared with all optical channels. In this configuration, we can reduce the optical hardware by managing the signal wavelength and the timing clock by one light source. This also leads to the scalability for the number of wavelengths.
The results of this studies are summarized as follows ; (1) we developed the multi-wavelength pulse source with the extremely low timing jitter by using the super-continuum generation technique in optical fibers. (2) we investigated the timing extraction of optical pulses by the opto-electric oscillators (OEO), and realized the synchronization of optical clock sources with low timing jitter lower than 100-fs. (3) we developed the in-service monitoring technique for the reconfigurable optical network, and demonstrate the in-service dispersion monitor in actual WDM transmission systems. (4) we developed an wavelength-selective OXC switch based on the proposed architecture and realized the OXC operation which can realize the scalability for the number of wavelength. Less
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