22 February 2018 Upconversion emission investigation of Tb3+/Yb3+ codoped CdF2 single crystals under infrared laser pump
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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 5D47F6 and 5D47F5 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.
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H. Boubekri, M. Diaf , Th. Pauporté, B. Viana, 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); doi: 10.1117/12.2294940; https://doi.org/10.1117/12.2294940
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