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<p>We demonstrate continuous-wave laser operation of a terbium (Tb<sup>3+</sup>)-doped ZBLAN fiber emitting in the green spectral region. Under pumping at 486&#xa0;nm, laser oscillation at 542&#xa0;nm was achieved in a 4&#xa0;m long Tb<sup>3+</sup>:ZBLAN double-clad fiber. A maximum output power of 6.2&#xa0;mW was obtained with a slope efficiency of 1.2% with respect to the launched pump power and 4.1% not taking into account the transmitted pump light. Versus the actual absorbed pump power, the efficiency is estimated to be comparable to crystalline fluoride hosts. The results represent a significant improvement over previously reported Tb<sup>3</sup>⁺-doped fiber lasers and highlight the potential of fluoride fibers for compact visible laser sources provided sufficient absorption efficiency can be achieved.</p>

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Green Tb3+:ZBLAN fiber laser

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月17日

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  • Moritz Badtke,
  • Sascha Kalusniak,
  • Ole Hahn,
  • Hiroki Tanaka,
  • Christian Kränkel

摘要

We demonstrate continuous-wave laser operation of a terbium (Tb3+)-doped ZBLAN fiber emitting in the green spectral region. Under pumping at 486 nm, laser oscillation at 542 nm was achieved in a 4 m long Tb3+:ZBLAN double-clad fiber. A maximum output power of 6.2 mW was obtained with a slope efficiency of 1.2% with respect to the launched pump power and 4.1% not taking into account the transmitted pump light. Versus the actual absorbed pump power, the efficiency is estimated to be comparable to crystalline fluoride hosts. The results represent a significant improvement over previously reported Tb3⁺-doped fiber lasers and highlight the potential of fluoride fibers for compact visible laser sources provided sufficient absorption efficiency can be achieved.