|Budget Amount *help
¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000)
Fiscal Year 2016: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2013: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
|Outline of Final Research Achievements
Optical fiber sensing techniques have been extensively studied all over the world due to their capability of distributed strain and temperature measurement. In this study, we have developed fiber-optic sensing systems using not only standard silica glass fibers but also polymer (or plastic) optical fibers. We have especially focused on the light scattering signal enhanced by fiber tapering, i.e., by diameter reduction via a heat-and-pull process. We have established multiple methods for polymer fiber tapering, and successfully demonstrated polymer-fiber-based distributed strain and temperature sensing for the first time in the world. Besides, we have improved the performance of the distributed sensing system itself, and achieved a world-record ultrahigh-speed operation of distributed strain sensing, opening up a new field of fiber-optic distributed vibration sensing.