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:
Jul. 20, 2010
Filed:
Jul. 27, 2005
Arto Salokatve, Tampere, FI;
Kalle Ylä-jarkko, Hämeenlinna, FI;
Arto Salokatve, Tampere, FI;
Kalle Ylä-Jarkko, Hämeenlinna, FI;
Corelase Oy, Tampere, FI;
Abstract
An active multimode optical fiber consisting of a first core section (), a thin barrier layer () material having a thickness (d) and a lower refractive index than that of the first core section by an index difference (Δn), a second core section () having a refractive index equal or higher than that of the first core section, and a cladding () having an index lower than that of the first core section. Said index difference and said thickness are selected so that a fundamental core mode couples less strongly with said cladding modes than higher order core modes. A scheme of changing the symmetry of the fiber for reduced sensitivity of the fundamental mode of the first core section to resonance effects.