| Project/Area Number |
06650045
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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 | CHIBA UNIVERSITY,FACULTY OF ENGINEERING |
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Principal Investigator |
OGURA Iwao CHIBA UNIVERSITY,FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (80013100)
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| Co-Investigator(Kenkyū-buntansha) |
OMATSU Takashige CHIBA UNIVERSITY,FACULTY OF ENGINNERING,RESEARCH ASSOCIATE, 工学部, 助手 (30241938)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | Second harmonic generation / Optical fiber / Photorefractive effects / Multi-photon absorption / シリカガラス / 二次の非線形光学効果 |
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| Research Abstract |
Theoretical investigation of a conversion efficiency of second harmonic generation in Ge-doped glass materials was carried out. Photo-carriors, generated by the multi-photon absorption during the seeding process, diffuse and produce a local electric field in glass materials. By the local electric field, the symmetry of glass materials is broken and the second order nonlinearity is induced. On the basis of this model, the second order nonlinear coefficient should be proportional to Iomega^4I_2omega^2 This scaling law agrees with the previous experimental results. Further, the build-up time of second order nonlinearity and the amplitude of local electric field depend on the excitation rate of photo-carriors. Doping impurities, which operate as a donor level, is effective for obtaining materials with larger nonlinearity.
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