| Project/Area Number |
23656243
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | The University of Tokushima |
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Principal Investigator |
GOTO Nobuo 徳島大学, ソシオテクノサイエンス研究部, 教授 (60170461)
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| Co-Investigator(Kenkyū-buntansha) |
YANAGIYA Shin-ichiro 徳島大学, 大学院・ソシオテクノサイエンス研究部, 助教 (40314851)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 光スイッチ / 非線形光学効果 / グラフェン / 可飽和吸収 / 光集積回路 |
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| Research Abstract |
This project aims to realize a high-speed all-optical switch by efficient control with graphene-loaded waveguides in the optical communication band. The proposed switch is based on our previously proposed all-optical wavelength-selective switch controlled by Raman amplification. Optical saturable absorption in graphene can be used to control the optical signal amplitude. First, we experimentally measured optical power-dependent insertion-loss in a graphene-loaded waveguide and its dependence on optical polarization by using a femtosecond laser source. The measured result shows that the obtained 10-dB change of insertion loss can be enough large for applying to the proposed switch. Next, we theoretically analyzed optical switching controlled by saturable absorption accompanied by refractive-index change. We found that the switching efficiency can be improved by considering the accompanied refractive-index change.
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