Upconversion luminescence of Ho3+-and Yb3+-codoped oxyfluride glass

Xiaobo Chen; Z. Charles Ying; N. Sawanobori

doi:10.1117/12.461659

5 April 2002 Upconversion luminescence of Ho³⁺-and Yb³⁺-codoped oxyfluride glass

Xiaobo Chen, Z. Charles Ying, N. Sawanobori

Proceedings Volume 4645, Rare-Earth-Doped Materials and Devices VI; (2002) https://doi.org/10.1117/12.461659
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

This paper studies upconversion luminescence of oxyfluoride glass codoped with holmium and ytterbium. When the sample was excited in the infrared at a wavelength of 960 nm, several visible luminescence peaks were observed. The two strongest upconversion luminescence peaks are located at 544 and 658 nm, which are due to the ⁵S₂ to ⁵I₈ and ⁵F₅ to ⁵I₈ transitions of Ho³⁺, respectively. Additional upconversion luminescence peaks are present at 485, 751, and 799 nm. The upconversion luminescence process is initiated by excitation of the codoped Yb³⁺ ions, followed by a transfer of energy from the excited Yb³⁺ ions to the Ho³⁺ ions. The dependence of the upconversion luminescence intensity with the excitation laser power obeys a power law with fractional exponent. This unusual saturation phenomenon is likely a result of energy diffusion.

Citation Download Citation

Xiaobo Chen, Z. Charles Ying, and N. Sawanobori "Upconversion luminescence of Ho³⁺-and Yb³⁺-codoped oxyfluride glass", Proc. SPIE 4645, Rare-Earth-Doped Materials and Devices VI, (5 April 2002); https://doi.org/10.1117/12.461659

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