Watt-level dysprosium fiber laser at 3.15 μm with 73% slope efficiency

R. I. Woodward*, M. R. Majewski, G. Bharathan, D. D. Hudson, A. Fuerbach, S. D. Jackson

*Corresponding author for this work

    Research output: Contribution to journalArticle

    36 Citations (Scopus)

    Abstract

    Rare-earth-doped fiber lasers are emerging as promising high-power mid-infrared sources for the 2.6–3.0 μm and 3.3–3.8 μm regions based on erbium and holmium ions. The intermediate wavelength range, however, remains vastly underserved, despite prospects for important manufacturing and defense applications. Here, we demonstrate the potential of dysprosium-doped fiber to solve this problem, with a simple in-band pumped grating-stabilized linear cavity generating up to 1.06 W at 3.15 μm. A slope efficiency of 73% with respect to launched power (77% relative to absorbed power) is achieved—the highest value for any mid-infrared fiber laser to date, to the best of our knowledge. Opportunities for further power and efficiency scaling are also discussed.

    Original languageEnglish
    Pages (from-to)1471-1474
    Number of pages4
    JournalOptics Letters
    Volume43
    Issue number7
    DOIs
    Publication statusPublished - 1 Apr 2018

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