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:
Mar. 20, 2018
Filed:
Sep. 12, 2014
Draka Comteq B.v., Amsterdam, NL;
Draka Comteq, B.V., Amsterdam, NL;
Abstract
The invention concerns a multimode optical fiber, with an ct-profile graded-index core with an a-value between 1.96 and 2.05 and a N value defined as N=(R/λ)(n−n) between 7 and 52, where Ris the multimode core radius, nis the maximum index of the multimode core and nis the minimum index at the outer edge of the graded index core. According to the invention, a depressed region directly surrounds the graded/index core and satisfies the criteria: −2.20<Dn<0, where Dnis the index difference of depressed region with external cladding, and 220 Ln(N)−1100<V<220 Ln(N)−865, where Vis the volume of the depressed region. Such a multimode fiber shows an increased OFL-bandwidth above 10000 Hz·km at an operating wavelength between 950 nm and 1310 nm.