The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2008
Filed:
Feb. 09, 2006
Tomio Kaise, Ueda, JP;
Asuka Nakayama, Ueda, JP;
Hidehiko Shimizu, Ueda, JP;
Tatuo Yamaguchi, Ueda, JP;
Masanori Nonomura, Ueda, JP;
Yasushi Murakami, Ueda, JP;
Tomio Kaise, Ueda, JP;
Asuka Nakayama, Ueda, JP;
Hidehiko Shimizu, Ueda, JP;
Tatuo Yamaguchi, Ueda, JP;
Masanori Nonomura, Ueda, JP;
Yasushi Murakami, Ueda, JP;
Totoku Electric Co., Ltd., Tokyo, JP;
Abstract
An optical fiber made of quartz or glass and having a core and a cladding includes a microporous silica solution applied to an outer peripheral surface thereof, 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.