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:
Sep. 30, 2008
Filed:
Jun. 26, 2006
Kazuhiko Aikawa, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Kazuyuki Hayashi, Sakura, JP;
Manabu Kudoh, Sakura, JP;
Kazuhiko Aikawa, Sakura, JP;
Katsuaki Izoe, Sakura, JP;
Kazuyuki Hayashi, Sakura, JP;
Manabu Kudoh, Sakura, JP;
Fujikura Ltd., Tokyo, JP;
Abstract
A polarization-maintaining optical fiber comprises: a core; a pair of stress-applying parts disposed one at each side of the core; and a cladding which surrounds the core and the stress-applying parts; wherein when the polarization-maintaining optical fiber is used at a wavelength of 0.81 μm to 0.87 μm, a cut-off wavelength measured with a fiber length of 2 m is longer than the wavelength used and polarization crosstalk when a fiber having a length of 1,000 m is wound on a reel having a diameter of 40 mm is equal to or less than −35 dB/100 m.