Barium gallo-germanate glasses co-activated with Cr 3+ /Er 3+ and Cr 3+ /Er 3+ /Ln 3+ (Ln = Yb, Ho) for near-infrared luminescence applications

Researchers have studied the near-infrared luminescence properties of barium gallo-germanate glasses co-activated with Cr3+/Er3+ and Cr3+/Er3+/Ln3+ (Ln = Yb, Ho) for the first time. They found that the near-infrared emission of Er3+ at 1534 nm in Cr3+/Yb3+/Er3+ glass is enhanced under direct excitation of Cr3+ at 600 nm. Additionally, luminescence quenching of Er3+ and enhancement of Ho3+ at 2000 nm were observed in Cr3+/Er3+/Ho3+ glass.

The energy transfer processes Cr3+ → Yb3+ → Er3+ and Cr3+ → Er3+ → Ho3+ were identified, with their efficiencies equal to nearly 55%. The study suggests promising applications for near-infrared luminescence using these barium gallo-germanate glasses.

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