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:
Nov. 15, 2016
Filed:
Dec. 28, 2011
R. Kirk Price, Battle Ground, WA (US);
Scott Karlsen, Battle Ground, WA (US);
Rob Martinsen, West Linn, OR (US);
Ronii C. Mehl, Caldwell, ID (US);
R. Kirk Price, Battle Ground, WA (US);
Scott Karlsen, Battle Ground, WA (US);
Rob Martinsen, West Linn, OR (US);
Ronii C. Mehl, Caldwell, ID (US);
nLIGHT, Inc., Vancouver, WA (US);
Abstract
A laser system can include an optical fiber having a spatial filter defined as a core extension coupled to or integrally formed in an optical fiber so as to reduce the coupling of optical radiation into a fiber cladding. Such a core extension can be formed by removing a length of the cladding from the optical fiber, leaving a portion of the core exposed at the end of the fiber. Alternatively, a core extension can be formed by coupling an end cap to the core of the optical fiber at a fiber end surface. By selecting a length of the core extension based on a beam divergence and beam diameter, radiation coupling into the fiber core can be reduced.