2014 Fiscal Year Final Research Report
Sensing function embedded in optical fiber using Femto-second laser processing
| Project/Area Number |
24510126
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Quantum beam science
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| Research Institution | Soka University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | フェムト秒レーザ加工 / 量子ビーム産業応用 / 光ファイバセンサ |
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| Outline of Final Research Achievements |
Novel sensing functions have been successfully embedded in a single mode optical fiber by means of femto-second, ultra short pulse laser material processing. A single laser pulse was focused on a thin optical fiber to produce an array of voids (macro cavity) in the close vicinity of core/cladding boundary region in the optical fiber. It has been found that such voids array plays an important role to create information how to know the direction of bending. A pulse train of 1-kHz femto-second laser was used to produce a very thin drilling hole which transversely penetrated a cylindrical structure of optical fiber with a hole diameter of a few micro-meters. It has been interestingly shown that such thin drilling holes provide us with an in-line optical fiber spectroscopic sensing function which might be a very viable technique to enable spectroscopic analysis by means of a pico-litter sampling.
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| Free Research Field |
レーザ工学、光電子工学、光ファイバセンシング
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