| Project/Area Number |
24244064
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
MISAWA Kazuhiko 東京農工大学, 工学(系)研究科(研究院), 教授 (80251396)
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| Co-Investigator(Kenkyū-buntansha) |
TAKADA Hideyuki 独立行政法人産業技術総合研究所, 電子光技術研究部門, 主任研究員 (50357357)
SUZUKI Takayuki 明治大学, 理工学部, 准教授 (80539510)
TORIZUKA Kenji 独立行政法人産業技術総合研究所, 電子光技術研究部門, グループ長 (30357587)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥46,800,000 (Direct Cost: ¥36,000,000、Indirect Cost: ¥10,800,000)
Fiscal Year 2014: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2013: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2012: ¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
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| Keywords | 超高速ファイバーレーザー / 可視域位相制御光源 / コヒーレント制御 / 利得狭窄補償 / モード同期Ybファイバーレーザー / 位相制御 / モード同期 Yb ファイバーレーザー |
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| Outline of Final Research Achievements |
Ultrashort pulses are widely used for investigating ultrafast phenomena in a variety of molecules by utilizing its ultrashort pulse duration. Yb-doped fibers have attracted attention owing to the high pumping efficiency and broad fluorescence bandwidth. However, pulse duration is limited to >100 fs because of the gain-narrowing effect during energy amplification.
We have developed a broadband chirped pulse amplifier system at 1 μm with a gain-narrowing compensator. We designed filters made of multiple dielectric layers. The amplified pulses had broad (1020-1080 nm) bandwidth by effective compensation of the gain-narrowing effect. The dispersion of the output pulse was measured by two-dimensional spectral shearing interferometry and compensated by the grating pair and spatial light modulator. The two-stage amplification system with filters generated 65-fs, 100-nJ, and 3-MHz pulses directly from the amplifier, allowing ultrafast spectroscopy at 1 μm and frequency-doubled 500 nm.
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