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AssigneeTotoku Electric Co., Ltd.
InventorsTomio Kaise, Asuka Nakayama, Hidehiko Shimizu, Tatuo Yamaguchi, Masanori Nonomura, Yasushi Murakami
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To the outer peripheral surface of an optical fiber made of quartz or glass and having a core and a cladding is applied a microporous silica solution, which is synthesized from a mixture of silicon alcoxide, active alcohol for facilitating hydrolytic action, alcohol, and water, by means of the sol-gel process, followed by baking to form a thin film of microporous silica made chiefly of silicon. Microporous of the thin film of microporous silica have function of cushioning to cushion and restrain that micro cracks much existing in the cladding undergo growth when the optical fiber is bent so that the optical fiber is likely to be broken. And the thin film of microporous silica which made chiefly of silicon has high heat-resistant properties similarly to the optical fiber itself. Accordingly, a heat-resistant optical fiber very excellent in heat-resistant properties is provided.
A heat-resistant optical fiber comprising an optical fiber having a core and a cladding and a thin film of microporous silica made chiefly of silicon and formed on the outer peripheral surface of the optical fiber.
A method of manufacturing a heat-resistant optical fiber involving that a microporous silica solution is applied onto the outer peripheral surface of an optical fiber having a core and a cladding, followed by baking to form a thin film of microporous silica made chiefly of silicon.
Dependencies are inferred from the claim text.