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:
Feb. 18, 2014
Filed:
Oct. 20, 2011
Valentin P Gapontsev, Worcester, MA (US);
Nikolai Platonov, Worcester, MA (US);
Valentin Fomin, Burbach, GE;
Michael Vyatkin, Fryazino, RU;
Valentin P Gapontsev, Worcester, MA (US);
Nikolai Platonov, Worcester, MA (US);
Valentin Fomin, Burbach, GE;
Michael Vyatkin, Fryazino, RU;
IPG Photonics Corporation, Oxford, MA (US);
Abstract
A high power single mode fiber laser system has a monolithic active fiber configured with a double bottleneck-shaped multimode (MM) core which is capable of supporting substantially only a fundamental mode at a given wavelength. The core has opposite uniformly configured end regions, frustoconical transformer regions running inwards from the respective end regions, and a central uniformly-dimensioned region which bridges the transformer regions. The MM core is configured with a refractive step-index profile which includes a continuous dip configured to shape an intensity field of the fundamental mode from a Gaussian or dome-shaped field profile to a two-peak-shaped profile and back to the Gaussian filed profile.