| Project/Area Number |
16560301
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Kagawa University |
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Principal Investigator |
NAKAGAWA Kiyoshi Kagawa Univ., Fac of Engin., Professor, 工学部, 教授 (50198032)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Ultra-short pulse / pulse duration / 超短パルスレーザー |
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| Research Abstract |
Measurement system for duration of ultra-short pulse laser with degenerate four-wave mixing process has been investigated. Photorefractive quantum well structure was grown by molecular beam epitaxy. After some mechanical and chemical processing, optical devices were fabricated by ourselves. In order to characterize the diffraction properties of these optical devices of quantum well structure, we perform degenerate four-wave mixing experiment. The grating writing laser is split into two beams by a cube beam splitter. These two beams interfere in the quantum well optical device without foucusing. The diffracted beam from the grating structure in quantum well is detected using a spectrometer to characterize the diffraction ability of the optical device. The desirable property can be observed from our optical devices. In the future, pulse duration measurement will be carried out by using our optical devices. In addition, the duration of ultra-short laser pulse was measured by collinear second harmonic generation geometry by using nonlinear BaB2O4 crystal. Good results were obtained. Nonlinear process with oxide optical crystal is easy to use. However, it needs to use high power laser beams.
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