2011 Fiscal Year Final Research Report
Highly efficient and precise laser processing by fiber laser with controlled spatial polarization
| Project/Area Number |
21360352
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Tohoku University |
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Principal Investigator |
SATO Shunichi 東北大学, 多元物質科学研究所, 教授 (30162431)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAMURA Takahiro 東北大学, 多元物質科学研究所, 助教 (50400429)
KOZAWA Yuichi 東北大学, 多元物質科学研究所, 助教 (90509126)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 偏光 / レーザー / 加工 |
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| Research Abstract |
We performed the generation and amplification of laser beams with inhomogeneous polarization distribution. Especially, high quality seed beams with radial and azimuthal polarizations were generated and amplified by using an optical fiber. High power and high quality beams with radial and azimuthal polarizations were successfully achieved by using a birefringent laser material. Furthermore, the performance was improved by a thin disk and polarization selective mirrors as a result of suppression of thermal effects. Higher order transverse mode laser beams were also obtained.
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