| Project/Area Number |
03402035
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
情報工学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
AKIYAMA Minoru The University of Tokyo,Faculty of Engineering, Professor, 工学部, 教授 (10010703)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Takashi The University of Tokyo,Faculty of Engineering, Assistant, 工学部, 助手 (90107566)
MIZUSAWA Junichi The University of Tokyo,Faculty of Engineering, Associate Professor, 工学部, 助教授 (50229689)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥19,800,000 (Direct Cost: ¥19,800,000)
Fiscal Year 1992: ¥9,200,000 (Direct Cost: ¥9,200,000)
Fiscal Year 1991: ¥10,600,000 (Direct Cost: ¥10,600,000)
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| Keywords | Photonic Switching / Integrated Photonic Communication Network / Switching / Communication |
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| Research Abstract |
Recently fiber optic transmission systems are widely introduced into public networks. But switching systems are left still be based on electronic technologies. It is because a switching system requires more sophisticated logical operations compared with a transmission system. The study aimed to find out fundamental technologies to build future switching and transmission system integrated photonic public network. The system in the research employed so called frequency multiplexed switching together with time multiplexed technologies at sending and receiving end terminals. It is considered that frequency multiplexed switching will provide very wide band switching such as tera bit per second. In the research two experimental switching systems (PPS-2 and PPS- 3) were developed and evaluated. Followings are research results. (1)The operation of frequency multiplexed switching was confirmed. Four frequencies from 600 to 900 nanometer are applied. (2)Proposed switching principle is that the frequency conversion works as contact point operation in case of space switching. (3)Two basic components are proposed,a frequency convberter module and a frequency filter module. Plural stage switching path was constructed and the stable operation is confirmed. The result shows the proposed two components switching path configuration could be expand such as a central office switching system.
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