Power scaling of ultrafast laser inscribed waveguide lasers in chromium and iron doped zinc selenide

Sean A. McDaniel, Adam Lancaster, Jonathan W. Evans, Ajoy K. Kar, Gary Cook

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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.

Original languageEnglish
Pages (from-to)3502-3512
Number of pages11
JournalOptics Express
Issue number4
Publication statusPublished - 22 Feb 2016


  • ZNSE
  • CDTE
  • NM

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