| Project/Area Number |
24760044
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | Osaka University |
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Principal Investigator |
NAGAI Masaya 大阪大学, 基礎工学研究科, 准教授 (30343239)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | テラヘルツ / 高効率 / 超短光パルス / 光整流 / 高強度 / 非線形光学 / 非線形結晶 / テラヘルツ光 / 波長変換 / THz波発生 |
|---|
| Research Abstract |
We experimentally demonstrate the generation and detection of broadband THz pulses with a bandwidth extending beyond 4 THz by using a 1.04-um Yb-doped fiber laser with a pulse duration of 0.48 ps. Owing to higher-order nonlinear processes in LiNbO3 crystals, THz pulses can be emitted efficiently with a bandwidth extending beyond the boundaries of the spectral width of the excitation pulse. By compressing divided sampling pulses to as short as 80 fs, we detected the THz pulse in the full spectral range, which could not be resolved with the original pulse. The precise control of the nonlinear effects and the compression of the sampling pulses compensated for the disadvantage of using a 1-um fiber laser. This work will contribute to the progress of nonlinear THz spectroscopy and imaging.
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