Emission at 1.3 µm from dysprosium-doped Ga:La:S glass

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Emission at 1.3 µm from dysprosium-doped Ga:La:S glass

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The potential for optical amplification at 1.3 µm is demonstrated in a dysprosium-doped gallium-lanthanum-sulphide based glass. Lifetimes of 59 µs are observed for the 6H9/2 - 6H15/2 transition for which the emission peaks at 1.32 µm. A radiative lifetime of 203 µs is calculated by a Judd-Ofelt analysis, indicating a total radiative quantum efficiency of 29%. A pump absorption cross-section 20 times greater than Pr3+ suggests that shorter fibre devices may be possible.

Inspec keywords: gallium compounds; dysprosium; sulphur compounds; lanthanum compounds; fibre lasers; chalcogenide glasses; laser transitions; optical glass

Other keywords: GaLaS:Dy; 29 percent; Dy-doped Ga-La-S glass; Judd-Ofelt analysis; optical amplification; 1.3 to 1.32 micron; radiative lifetime; pump absorption cross-section; total radiative quantum efficiency

Subjects: Solid lasers; Optical glass; Fibre lasers and amplifiers; Other fibre optical devices and techniques; Design of specific laser systems; Optical materials; Fibre optics

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