Study of a femtosecond single-shot transient absorption spectroscopy using discretely oscillating optical frequency comb
| Project/Area Number |
17K19069
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied physics and engineering and related fields
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| Research Institution | Saitama University |
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Principal Investigator |
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| Project Period (FY) |
2017-06-30 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 光計測 |
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| Outline of Final Research Achievements |
We have studied an optical system, which can performs a single-shot phase measurement in the 40 ps time domain by 25 GHz sampling between modes of the 200 GHz optical frequency comb. In case to apply this technology to transient response measurement, wideband and high-resolution phase spectrum measurement and control technology are required to achieve both time resolution and wide time window. A time parallel measurement system has been devised to enable the phase spectrum measurement to be obtained by a phase detection circuit. The amplitude and phase spectra were measured at 375 GHz (25 GHz, 15 modes), and it was experimentally demonstrated that ultrafast optical electric field waveforms with a 2.7 ps resolution and a 40 ps time range can be measured.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の目的は、既存の高速光波形計測の限界を打破し、“シングルショット”でフェムト秒時間分解できる光波形計測法を開発して、高分子重合反応や分解反応の様に一度しか生じない現象を捉えられるポンプ・プローブ過渡吸収計測を可能にする新たな光計測システムを確立することである。
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Report
(4 results)
Research Products
(47 results)
