1992 Fiscal Year Final Research Report Summary
Fiber optic power-feed system for biomedical application
| Project/Area Number |
02452178
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
計測・制御工学
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| Research Institution | Institute for Medical and Dental Engineering, Tokyo Medical and Dental University |
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Principal Investigator |
TOGAWA Tatsuo Professor, Institute for Medical and Dental Engineering, Tokyo Medical and Dental University, 医用器材研究所, 教授 (40013859)
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| Co-Investigator(Kenkyū-buntansha) |
TAMURA Toshiyo Associate Professor Department of Electric and Electronic Engineering, Yamaguchi, 工学部電気電子工学科, 助教授 (10142259)
SAITO Hirokazu Research Assistant Institute for Medical and Dental Engineering, Tokyo Medical a, 医用器材研究所, 教務職員 (00205668)
TSUJI Takayuki Associate Professor Institute for Medical and Dental Engineering, Tokyo Medical, 医用器材研究所, 助教授 (00075764)
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| Project Period (FY) |
1990 – 1992
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| Keywords | Optical power-feed / Laser diode / Fiber optic communication / Solar cell / Temperature measurement / Opto-electric conversion |
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| Research Abstract |
An attempt was made to develop an optical power-feed system capable of supplying power to sensors and interfacing circuits. Laser light was transmitted to solar cells, where the optical energy was converted into electrical energy. A continuous-wave laser diode (wavelength 813 nm, maximum optical power 800 mW) was used as the light source. A laser diode with graded-index fiber coupling (400 mm core diameter, numerical aperture 0.2) was connected to 8 solar cells assembled in series around the fiber end. The active area of each solar cell was 0.5\0.27 cm. The open-circuit voltage and the short-circuit current were found to be about 4.5 V and about 8.5 mA, respectively, with a laser diode optical power of 650 mW. Upon temperature measurement using this power-feed system, the modulated signal could be transmitted by a light-link diode via a step index fiber. The results indicated that the system can be used as a power supply for conventional sensor elements.
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