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:
Oct. 21, 2008
Filed:
Apr. 12, 2007
Kazuhiko Aikawa, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Naoki Shamoto, Sakura, JP;
Manabu Kudoh, Sakura, JP;
Takashi Tsumanuma, Sakura, JP;
Kazuhiko Aikawa, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Naoki Shamoto, Sakura, JP;
Manabu Kudoh, Sakura, JP;
Takashi Tsumanuma, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A radiation resistant single-mode optical fiber has a core and a cladding, each made of fluorine-doped silica glass, in which a chlorine concentration of the core is at least 0.01 ppm, a relative refractive index difference of the core based on the refractive index for silica is between −0.30% and −0.10%, a relative refractive index difference of the core based on the refractive index for the cladding is between 0.3% and 0.5%, a cutoff wavelength is 1.27 μm or below, and a bending loss at a wavelength of 1.3 μm and a bending diameter of 20 mm is 0.5 dB/m or less.