Development of CsLiB6O10 crystal with high photorefractive damage tolerance and its application to high-power UV light generation
| Project/Area Number |
26286064
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Optical engineering, Photon science
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| Research Institution | Osaka University |
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Principal Investigator |
YOSHIMURA MASASHI 大阪大学, レーザーエネルギー学研究センタ, 教授 (60314382)
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| Co-Investigator(Kenkyū-buntansha) |
森 勇介 大阪大学, 工学(系)研究科(研究院), 教授 (90252618)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
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| Keywords | 非線形光学結晶 / 紫外レーザー / フォトリフラクティブ損傷 / 結晶成長 / 波長変換 |
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| Outline of Final Research Achievements |
We have developed high-quality CsLiB6O10 (CLBO) suitable for applications of high-power deep-UV light generation. Reduction in light scattering defects inside the crystal or aluminium doping in crystal improve ultraviolet-induced degradation resistance. We also designed a prism-coupled CLBO device which takes advantage of non-collinear phase-matching in order to compensate the walk-off effect in 355 nm third-harmonic generation (THG). Based on this new device, which is equipped with a nanosecond Nd:YVO4 laser source, THG was achieved with 2.55 W at 52.8% conversion efficiency from the geometric mean of input infrared and green powers. We also employed a hybrid picosecond laser system to reduce the walk-off effect of CLBO. Maximum output power of 30.9 W was obtained from the fundamental source of 64 W at the repetition rate of 300 kHz. The conversion efficiency of 48.3% could be reached, which is about 1.2 times the generation obtained via LBO.
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Report
(4 results)
Research Products
(28 results)
