| Summary: | 碩士 === 國立中興大學 === 化學系所 === 107 === Optical hollow waveguide can transmit optical radiation in many optical regions. Therefore, this theory was focused on developing method to fabricate optical hollow waveguide by decorating highly reflective silver layer on inner wall of polyethylene(PE) tube.
To overcome the instability of Ag layer on PE tube, PE tube was first treated with oxidant to form polar functional group on the surface of PE tube to improve the Ag adsorption.
The factors affecting oxidation efficiencies were systematically examined including species in oxidants, concentration of oxidants, the oxidation time, and the oxidation temperature. To have a fair comparison, oxidized PE tubes were further decorated with Ag layer by silver mirror reaction(SMR). Results indicated that KClO3 showed the best oxidation efficiency than other examined oxidants. Meanwhile, concentration of oxidant did not show significant impact in the examined concentration range. Oxidation time around 15 min and oxidation temperature higher than 60oC were sufficient. With optimized oxidation condition, PE-based optical hollow waveguide were fabricated. However, the generation of Cl2 by KClO3 degraded its performance. Therefore, K2Cr2O7 was used in production of optical hollow waveguides. By optimizing the SMR reaction for decorating Ag layer on the inner layer of PE tube, the formed optical hollow waveguide confirmed that it can transmit visible and achieve optical loss of 0.1 dB/cm under specific infrared measurement conditions.
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