2001 Fiscal Year Final Research Report Summary
Nonlinear spatio-temporal photonicswith tera optical pulse
| Project/Area Number |
11792005
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| Research Category |
Grant-in-Aid for University and Society Collaboration
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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 | Osaka University |
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Principal Investigator |
ITOH Kazuyoshi Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (80113520)
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| Co-Investigator(Kenkyū-buntansha) |
KONISHI Tsuyoshi Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (90283720)
TANIDA Jun Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (00183070)
ICHIOKA Yoshiki Nara Nationl College of Technology, Principal, 校長 (30029003)
HANGYO Masanori Reserch Center for Superconductor Photonics, Professor, 教授 (10144429)
WATANAE Wataru Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (90314377)
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| Project Period (FY) |
1999 – 2001
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| Keywords | ultrashort pulse / nonlinear spatiao-temporal photonics / tera optical pulse / supercontinuum / micromachining / optical imformation processing / self-trapping / spectral tomography |
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| Research Abstract |
The purpose of this research was to establish the optical technology of nonlinear spatio-temporal photonics with ultrashort laser pulses in collaboration with Venture Business Laboratory and COE Osaka. "Development of basic tera optical information technologies" The results obtained in the research term are listed below.
Induction of refractive index change by self-trapped filaments
We induced the refractive index change by using the filaments formed by femtosecond laser pulses (800nm) focused into silica glass. The diameter of the area of refractive index change was approximately 2 microns and the length was several ten toseveral hundred mm. The maximum refractive index change was 0.01.
Optical seizing and mering of voids
We focused the ultrashort laser pulses by high-NA objectives and formed voids inside glass. We succeeded in moving the void by approximately 5 microns along the optical axis by repeating the irradiation of the ultrashort laser pulse and translation of the focusing lens. We also succeeded in merging the two voids into one.
Spectrotomography
We built a non-dispersive and a dispersive coherence spectrotomography systems that measure simultaneously the spatial and spectral information inside the object. The dispersive coherence spectrotomograpy system was evaluated by applying the system to small shrimps. We succeeded in obtaining clear spectrotomography image of the tail of shrimp.
Ultrafast spatio-temporal information processing
We demonstrate fundamental functions for ultrafast optical routing by using an elemental part of an ultrafast optical technique for conversion of time to two-dimensional space. A preliminary experimental result shows that recognition of header signals can be achieved at a rate of more than 600 Gbytes/s.
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