Efficient 2.05 μm emission of Ho3+/Yb3+/Er3+ triply doped fluorotellurite glasses

• The new Ho3+/Yb3+/Er3+ triply doped fluorotellurite glass is prepared.
• Strong 2.05 μm emission can be obtained in the triply doped samples.
• Efficient energy transfer can happen in the triply doped sample.
• Detailed energy transfer processes have been discussed.

The 2.05 μm emission has been obtained using a 980 nm laser excitation in Ho3+/Yb3+/Er3+ triply doped fluorotellurite glass. Strong emission near 2.05 μm is demonstrated and the corresponding energy transfer mechanisms are discussed and analyzed according to the photoluminescence performance and absorption measurements. Yb3+ and Er3+ ions can absorb the pumping energy and transfer it to Ho3+ ions efficiently. These results indicate that this Ho3+/Yb3+/Er3+ triply doped fluorotellurite glass has potential applications in 2.0 μm laser.

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