| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
Extremely flexible hollow fibers were developed for infrared laser light delivery. The silver layer was inner-plated by using the silver plating technique. Parallel arranged bundles of silica capillaries were used to increase the cross-sectional area. Four bundles of 300 pieces of silica capillaries with an inner diameter of 75-μm, an outer diameter of 150-μm and a length of 20 cm were bundled. And the four bundles with an inner diameter of 75-μm and a length of 20 cm and three silica capillaries with an inner diameter of 530-μm and a length of 50 cm were connected in parallel to increase the flow rate. The loss for the 75-μm-bore size, 10-cm-length silver hollow fiber was 5 dB at the wavelength of 1-μm. Thin dielectric layer was formed by using liquid-phase coating method for low-loss transmission of Er:YAG laser light. And the tip end of the ultra-thin hollow fiber was heated to fabricate a tip sealing part.
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