ALEXANDRIA, Va., June 4 -- United States Patent no. 12,322,921, issued on June 3, was assigned to Texas Tech University System (Lubbock, Texas).

"Optical gain materials for high energy lasers and laser illuminators and methods of making and using same" was invented by Hongxing Jiang (Lubbock, Texas), Zhenyu Sun (Lubbock, Texas), Yaqiong Yan (Lubbock, Texas), Jing Li (Lubbock, Texas) and Jingyu Lin (Lubbock, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "Core-cladding planar waveguide (PWG) structures and methods of making and using same. The core-cladding PWG structures can be synthesized by hydride vapor phase epitaxy and processed by mechanical and chemical-mechanical polishing. An Er doping concentr...