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Sol–Gel-Processed SiO2/TiO2/Methylcellulose Composite Materials for Optical Waveguides

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SiO2–TiO2–methylcellulose (MC) composite materials processed by the sol-gel technique were studied for optical waveguide applications. Dense, crack-free and homogeneous films as thick as 2 m were obtained via the organic binder MC-assisted sol–gel process and single coating with low-temperature treatment. Light waveguiding in such hybrid film was demonstrated at a wavelength of 650 nm. About 1.1 dB/cm or lower propagation loss for the SiO2 (80 mol%)–TiO2 (20 mol%)–MC (22 wt%) film can be achieved. The effects of thermal treatment on the structure and properties of the gel films were also investigated.
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Document Type: Research Article

Affiliations: 1: Nanotechnology Centre, Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China 2: Structure Research Laboratory, University of Science and Technology of China, Hefei, Anhui, China 3: Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K. 4: Department of Physics, University of Science and Technology of China, Hefei, Anhui, China

Publication date: November 1, 2005

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