WASHINGTON (June 1, 2020) Matthew Wolford, a U.S. Naval Research Laboratory research chemist, inspects an argon fluoride (ArF) laser to be tested with new, thicker stainless foils in Washington, D.C., June 1, 2020. Wolford is part of a team of researchers who outfitted the ArF laser with new foils in hopes of increasing laser output. The ArF laser is the world’s largest studying the physics of developing a high efficiency electron-beam pumped ArF laser at 193 nanometers. (U.S. Navy photo by Jonathan Steffen)