nLIGHT, Inc. is a provider of semiconductor and fiber lasers for aerospace and defense, industrial, and microfabrication applications. The Company operates through two segments: Laser Products, and Advanced Development. The Laser Products segment includes high-power semiconductor lasers and fiber lasers that are typically integrated into laser systems or manufacturing tools built by its customers. This segment also includes fiber amplifiers and beam combination and control systems for use in high-energy laser (HEL) systems in directed energy applications, and laser sensing products used in a range of defense applications. The Advanced Development segment focuses on the research, design, and prototyping of next-generation laser technologies for the defense industry, including the development of custom high-power fiber lasers and advanced beam combining technologies. The Company sells high-power semiconductor lasers with a broad range of power levels, wavelengths, and output fiber sizes.