title: Power scaling of ultrafast laser inscribed waveguide lasers in chromium and iron doped zinc selenide.
abstract: We report demonstration of Watt level waveguide lasers fabricated using Ultrafast Laser Inscription (ULI). The waveguides were fabricated in bulk chromium and iron doped zinc selenide crystals with a chirped pulse Yb fiber laser. The depressed cladding structure in Fe:ZnSe produced output powers of 1 W with a threshold of 50 mW and a slope efficiency of 58%, while a similar structure produced 5.1 W of output in Cr:ZnSe with a laser threshold of 350 mW and a slope efficiency of 41%. These results represent the current state-of-the-art for ULI waveguides in zinc based chalcogenides.
authors.forename: Sean A
authors.initials: SA
authors.lastname: McDaniel
authors.forename: Adam
authors.initials: A
authors.lastname: Lancaster
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Evans
authors.forename: Ajoy K
authors.initials: AK
authors.lastname: Kar
authors.forename: Gary
authors.initials: G
authors.lastname: Cook