2014 Fiscal Year Final Research Report
Development of a Miniature Laser-Induced Underwater Shockwave-Generating Device using an Optical Fiber
| Project/Area Number |
24650273
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Biomedical engineering/Biological material science
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| Research Institution | Saitama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SHIBUTANI Hideo 久留米工業大学, 工学部, 准教授 (80303709)
UJIHARA Yoshihiro 川崎医科大学, 医学部, 助教 (80610021)
IKENO Junichi 埼玉大学, 工学部, 教授 (10184441)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 衝撃波 / 微細加工 |
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| Outline of Final Research Achievements |
We attempted to develop a miniature shockwave-generating device using an optical fiber with a 1 mm diameter. The tip of an optical fiber was finely polished, finished with chemical agents, and coated with a titanium film by vacuum evaporation. A pulse laser was applied to the titanium film through the optical fiber, and a shockwave was induced by thermoelastic effects. The results showed that the shockwave pressure varied depending on whether the fiber tip was polished and whether the film was cracked. In the polished fibers with less cracked films, the shockwave pressure reached 0.3 MPa when a laser with the power density of 80 GW/m2 was introduced. Given the same laser power density, the shockwave pressure decreased by approximately 40% when the fiber tip was not polished and when the film was more cracked. These results highlighted the importance of strict quality control of the surface texture and the metallic film of the optical fibers when generating strong shockwaves.
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| Free Research Field |
バイオメカニクス
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