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:
Oct. 20, 2015
Filed:
Mar. 17, 2015
Q-peak, Incorporated, Bedford, MA (US);
Peter Moulton, Concord, MA (US);
Evgueni Slobodtchikov, Lexington, MA (US);
Yelena Isyanova, Chestnut Hill, MA (US);
Q-Peak, Incorporated, Bedford, MA (US);
Abstract
A fiber laser system includes at least one optical fiber with a core and a cladding and is operative at a first wavelength larger than 2000 nm. The operative first wavelength is preferably chosen to maximize transmission through the atmosphere. At least one optical pumping system includes one or more pumping fiber lasers also doped with thulium for pumping the optical fiber. The pumping system is operative at a second, shorter wavelength close to the first wavelength for low quantum defect pumping. The core of the optical fiber is doped with thulium at a doping concentration greater than one weight % to reduce absorption losses in the core.