Upconversion emission investigation of Tb3+/Yb3+ codoped CdF2 single crystals under infrared laser pump

H. Boubekri; M. Diaf; Th. Pauporté; B. Viana; J.P. Jouart

doi:10.1117/12.2294940

22 February 2018 Upconversion emission investigation of Tb³⁺/Yb³⁺ codoped CdF₂ single crystals under infrared laser pump

H. Boubekri, M. Diaf , Th. Pauporté, B. Viana, J.P. Jouart

Author Affiliations +

Proceedings Volume 10528, Optical Components and Materials XV; 105281Y (2018) https://doi.org/10.1117/12.2294940
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Tb³⁺/Yb³⁺ co-doped CdF₂ single crystals were successfully fabricated by the Bridgman technique from a vacuum furnace in fluoride atmosphere. The structural and luminescent properties were investigated by X-ray diffraction, optical absorption and luminescence techniques at room temperature. The emission spectra exhibit a weak blue and green emission under 350 nm excitation and a strong emission under 975 nm in the spectral range 450 – 510 nm and 510 – 570 nm which are assigned to ⁵D₄ → ⁷F₆ and ⁵D₄ → ⁷F₅ transitions of Tb³⁺ ions, respectively. Furthermore, the time resolved decay time spectra are also obtained using pulse laser. The obtained upconversion spectra under 940 nm diode laser excitation at different powers showed the two-photon absorption process responsible of blue, green and red emissions.

Citation Download Citation

H. Boubekri, M. Diaf , Th. Pauporté, B. Viana, and J.P. Jouart "Upconversion emission investigation of Tb³⁺/Yb³⁺ codoped CdF₂ single crystals under infrared laser pump", Proc. SPIE 10528, Optical Components and Materials XV, 105281Y (22 February 2018); https://doi.org/10.1117/12.2294940

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