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:
Aug. 12, 2014
Filed:
Oct. 18, 2012
J-fiber Gmbh, Jena, DE;
Wolfgang Hämmerle, Jena, DE;
Harald Hein, Jena, DE;
Christian Genz, Jena, DE;
Lothar Brehm, Jena, DE;
Falk Wirth, Jena, DE;
J-Fiber GmbH, Jena, DE;
Abstract
The invention relates to a bend insensitive gradient index multimode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and numerical aperture that is uniform over its length, a core (), an inner cladding (), a refraction index trench () and an outer cladding (), wherein the core () includes a core radius R, an alpha-refraction index profile and a core refraction index difference dnwith respect to the outer cladding (), wherein the refraction index trench () includes a refraction index trench radius Rand a trench refraction index difference dnwith respect to the outer cladding (), wherein the outer cladding () includes an outer cladding radius Rand a refraction index between 1.40 and 1.55, wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and 300 m decreases by less than 5% and the numerical aperture decreases by less than 2.5% and the curvature related attenuation increase for two turns and a curvature radius of 7.5 mm is less than 0.2 db.