2012 Fiscal Year Final Research Report
High power laser systems with a controlled carrier-envelope phase and an over-one-octave infrared bandwidth
| Project/Area Number |
22560037
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | University of Yamanashi |
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Principal Investigator |
HARIMOTO Tetsuo 山梨大学, 大学院・医学工学総合研究部, 教授 (80273035)
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| Project Period (FY) |
2010 – 2012
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| Keywords | アト秒レーザー / 非線形光学効果 / 光パラメトリック増幅 / チャープパルス増幅 / レーザー安定性 |
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| Research Abstract |
An optimum design of a tiling scheme with nonlinear optical crystals for a large scaleoptical parametric chirped pulse amplification system was achieved. In comparison withthe single-pass configuration, the enhancement factor of the second-harmonic laser at 532nm with the two-pass configuration is up to 2.5 in a type I beta-barium borate crystal. Thepeak-intensity stability of a nanosecond-order fundamental laser at 1064 nm is improvedfrom 7% to 2% with a type I non-critical phase-mismatching lithium triborate crystalheated at an environment temperature of 146oC. In addition, a simple method with theparameter S used to evaluate the thickness of the nonlinear optical crystal correspondingto the maximum second-harmonic intensity was achieved under the phase-mismatchingcondition.
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