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Proceedings Paper

Femtosecond laser microprocessing for implanting sensor function into optical fibers
Author(s): Kenji Goya; Daisaku Tokita; Kazuhiro Watanabe
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Paper Abstract

The purpose of this study is to fabricate an internal structure in a silica fiber using internal processing with a femtosecond laser to develop a novel optical fiber sensor. We have found that bending directions can be detected by measuring transmitted light that has been affected from non-axial symmetry-sensing region in our proposed optical fiber sensor. In this paper, an optical fiber-processing experiment is carried out with the intensity of light transmitted through the sensing region being measured so that light loss through internal processing is measured. In the processing experiment, it was confirmed that use of a Ti:sapphire laser results in a processed region inside the fiber. In the measurement experiment, light transmitted through the core of a processed fiber was measured when the fiber was bent toward the processed region and when the fiber was bent toward the other side. The intensity of transmitted light obtained was found to be dependent on the two bending directions. This indicates that detection of the bending direction is possible. Experimental results are presented for the optimum irradiation parameters for internal processing of optical fibers for the fabrication of various required dot structures in the vicinity of the fiber core surface. We also report measurement experiment for the processed fiber.

Paper Details

Date Published: 16 November 2010
PDF: 6 pages
Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 775129 (16 November 2010); doi: 10.1117/12.880920
Show Author Affiliations
Kenji Goya, Soka Univ. (Japan)
Daisaku Tokita, Soka Univ. (Japan)
Kazuhiro Watanabe, Soka Univ. (Japan)


Published in SPIE Proceedings Vol. 7751:
XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers

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