ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,719,228, issued on Aug. 25, was assigned to nLIGHT Inc. (Camas, Wash.).
"Single mode beam" was invented by Christopher Luetjen (Camas, Wash.) and Roger Farrow (Camas, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Optical fiber structures for generating a single mode, saddle shaped output beam include first and second lengths of fiber. The first length of fiber has a first input end configured to receive a single mode gaussian beam. The second length of fiber has a second input end coupled to an output end of the first length of fiber. The second length of fiber includes a centrally located anti-guiding core and an annular guiding region coaxially...