| Project/Area Number |
13355017
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 Electro-Communications |
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Principal Investigator |
MIKI Tetsuya The University of Electro-Communications, Faculity of Electro-Communications, Professor, 電気通信学部, 教授 (60272762)
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| Co-Investigator(Kenkyū-buntansha) |
KISHI Naoto The University of Electro-Communications, Faculity of Electro-Communications, Assistant Professor, 電気通信学部, 助教授 (10195224)
KAWANO Katsuyasu The University of Electro-Communications, Faculity of Electro-Communications, Professor, 電気通信学部, 教授 (90017418)
NAKAJIMA Nobuo The University of Electro-Communications, Faculity of Electro-Communications, Professor, 電気通信学部, 教授 (70323889)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥39,390,000 (Direct Cost: ¥30,300,000、Indirect Cost: ¥9,090,000)
Fiscal Year 2002: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2001: ¥21,190,000 (Direct Cost: ¥16,300,000、Indirect Cost: ¥4,890,000)
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| Keywords | optical access system / opto-electric conversion / radio on fiber / electric powerless system / optical power supply / Raman amplification |
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| Research Abstract |
The purpose of this research program is to propose and study the feasibility of a new radio on fiber access system for high-speed wireless communication without any external electric power supply facilities.
The following results were obtained.
*With the proposed optical power feeding technique, the electrical power of 15mW and the electric voltage of 2V were obtained.
Hence, it is found that all of the electronic/optical components, including a low-noise amplifier and an optical modulator could be successfully driven.
*An electroabsorption modulator was employed as the optical modulator at the base station. 10dB sensitivity improvement was achieved with the electrical bias supplied by the fed optical power.
*The low-noise amplifier was designed under the condition of small power supply up to 10mW. The maximum gain of 14dB for single-stage, or 22dB for dual-stage was obtained.
*With the stimulated Raman effect by the optical power feeding, the optical signal gain more than 2dB was obtained for a 10Km-long optical transmission line. Hence the optical power feeding was found to be effective for optical signal power compensation.
Finally, the system experiment was done with the integration of above techniques, which resulted in 22dB sensitivity improvement compared with the existing powerless systems.
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