| Project/Area Number |
16360029
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied optics/Quantum optical engineering
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
NISHIOKA Hajime The University of Electro-Communications, Institute for Laser Science, Associate Professor (70180586)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2006: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2005: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2004: ¥10,400,000 (Direct Cost: ¥10,400,000)
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| Keywords | Lasers / phase conjugation / ultrashort pulse lasers / group-delav-dispersion / phase correction / diffractive optics / nonlinear optics / ultrashort pulse lasers / phase conjugation / nonlinear optics / group-delay-dispersion / diffractive optics / Freequency domain phase conjugation / Time-reversal / Diffracive optics / Ultrashort pulse lasers / Group-delay compensation |
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| Research Abstract |
Objective of our research is automatic compensation of GDD (group-delay-dispersion) by FDPC (frequency-domain phase-conjugation) wave in non-resonant media by coherence transformation. The FDPC wave is time reversed replica of a signal wave and regenerate initial pulse shape after passing through again the same GDD elements. We have proposed new scheme, two-photon gated pulse recording and time-reversed play back, to generate the FDPC wave. In experiments, we have demonstrated that pulse regeneration of a 10fs laser pulse with the two-photon gated diffractive optics. Part of our research is as the follows:
2. A new scheme to compensate higher order group-delay-dispersion in a CPA (chirped-pulse-amplification) has been proposed.
2. A new scheme to compensate higher order group-delay-dispersion in a CPA(chirped-pulse-amplification) has been proposed.
3. Femtosecond pulse amplification in a photorefractive medium has been demonstrated by the two-photon gated scheme. The gain bandwidth of 32 THz has been measured.
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