2006 Fiscal Year Final Research Report Summary
An arbitrarily shaped microwave source for ultra wideband radio communication using femtosecond laser pulse shaping
| Project/Area Number |
17360168
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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 | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Keio University |
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Principal Investigator |
KANNARI Fumihiko Keio University, Faculty of Science and Technology, Professor, 理工学部, 教授 (40204804)
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| Co-Investigator(Kenkyū-buntansha) |
SANADA Yukitoshi Keio University, Faculty of Science and Technology, Associate Professor, 理工学部, 助教授 (90293042)
TSUDA Hiroyuki Keio University, Faculty of Science and Technology, Associate Professor, 理工学部, 助教授 (90327677)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Applied Optics・Quantum Optical Engineering / High Quality Lasers / Information Communication Engineering / Advanced Communication / Microwave |
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| Research Abstract |
Arbitrarily shaped microwave signal ranging from 3 to 20 GHz for ultra wideband (UWB) radio communication is constructed using spectrally shaped femtosecond laser pulses and their E-0 conversion with a fast photodiode. The shaped spectrum of the femtosecond laser pulse is proportionally transferred to the temporal shape by travelling through an optical fiber. The transfer functions of electrical devices in a transmission system including an UWB antenna, especially their group delay characteristics, can be compensated for by the launched laser pulse shape. The transmission of UWB-impulse signal ranging 3-6 GHz is successfully accomplished with a commercial UWB antenna apart at 50 cm.
This arbitrarily shaped microwave source is useful to examine cross-talking with existent radio communication systems such as radio LAN for a specific UWB encoding, or to measure the response function of electric devices in the transmission system.
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