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  11. A Family Of Low-loss High-concentration Rare-earth-doped Ga-as-sb-s Chalcogenide Glass Fibers For Mid-infrared Laser Application

A family of low-loss high-concentration rare-earth-doped Ga-As-Sb-S chalcogenide glass fibers for mid-infrared laser application

Jinchang Zhang, Yantao Xu, Xusheng Xiao

    Optics Express
    |June 14, 2025

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    View abstract on PubMed

    Summary
    This summary is machine-generated.

    Researchers developed a new chalcogenide glass for mid-infrared fiber lasers. This novel material offers low optical losses and high rare-earth solubility, enabling high-performance lasers.

    Area of Science:

    • Materials Science
    • Photonics
    • Laser Technology

    Background:

    • Chalcogenide glasses are crucial for mid-infrared (mid-IR) applications.
    • Developing efficient gain media for fiber lasers in the 2-5 µm range remains a challenge.

    Purpose of the Study:

    • To introduce a novel chalcogenide glass composition (Ga0.8As34.2Sb5S60) as a gain medium for mid-IR fiber lasers.
    • To investigate the properties of rare-earth (Tm3+, Ho3+, Dy3+, Pr3+) doped glasses for laser applications.

    Main Methods:

    • Fabrication of few-mode double-clad fibers using the novel glass composition.
    • Systematic characterization of thermal stability, absorption, and mid-IR emission properties.
    • Measurement of optical losses and rare-earth solubility.

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    Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
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    Main Results:

    • Achieved high rare-earth solubility up to 2000 ppmw.
    • Demonstrated record-low optical losses: 0.31 dB/m (Ho3+) and 0.57 dB/m (Pr3+).
    • Dy3+ and Tm3+ doped fibers showed low losses of ~1-2 dB/m.

    Conclusions:

    • The novel chalcogenide glass exhibits excellent thermal stability and high rare-earth solubility.
    • These doped fibers show significant potential for high-performance fiber lasers in the 2-5 µm range.