1995 Fiscal Year Final Research Report Summary
Research on LiNbO_3 Optical Modulator using Superconducting Electrod
| Project/Area Number |
06650056
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
YOSHIDA Keiji Kyushu Univ, Electronics, Assoc.Prof., 工学部, 助教授 (80108670)
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| Co-Investigator(Kenkyū-buntansha) |
KISU Takanobu Kyushu Univ, Electronics, Assistent, 工学部, 助手 (00221911)
ENPUKU Keiji Kyushu Univ, Electronics, Assoc.Prof., 工学部, 助教授 (20150493)
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| Project Period (FY) |
1994 – 1995
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| Keywords | optical modulator / LiNbO_3 / superconducting electrodes |
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| Research Abstract |
In the fields of optical communication and optical information processing, development of high-speed and high efficiency optical modulator is one of the most important targets. High speed optical modulator with LiNbO_3 is most promising as the ultra-high speed optical modulator in the next generation in place of the direct modulator using semiconductor lasers. The performance of this modulator was limited by the olsses in the signal electrode. The purpose of this research is to introduce superconducting electrodes with low loss and low dispersion characteristics to overcome this problem.
In this year the following research has been made :
1) performance evaluation using computor simulation
2) change from He-Ne laser to semiconductor laser
3) introduction of high quality Nb film as an electrode material
4) introduction of automatic measurement of experimental data using GP-IB
5) enlargement of substrate length from 15mm to 30mm
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