Up-conversion cooperative radiation fluorescence oriented from a kind of couple state of cluster

Xiaobo Chen; Guangyin Zhang; N. Sawanobori; Yinguan Sun; Meixian X. Li

doi:10.1117/12.382873

13 April 2000 Up-conversion cooperative radiation fluorescence oriented from a kind of couple state of cluster

Xiaobo Chen, Guangyin Zhang, N. Sawanobori, Yinguan Sun, Meixian X. Li

Proceedings Volume 3942, Rare-Earth-Doped Materials and Devices IV; (2000) https://doi.org/10.1117/12.382873
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

This paper reports a quite interesting 474 nm up-conversion fluorescence when ErYb co-doped oxyfluoride glass is excited by 966 nm-diode laser. It was found that the 474 nm fluorescence is two-photon fluorescence. It can be found also that 474 nm fluorescence is posited between 490.5 nm ⁴F_7/2 yields ⁴I_15/2 and 454.0 nm ⁴F_5/2 yields ⁴I_15/2 fluorescence transition, and cannot be the transition from high excited state to first excited state of Er³⁺ ion also. In brief, the 474 nm fluorescence must be an extraordinary up-conversion fluorescence of ErYb co-doped oxyfluoride glass. In fact, it is reasonable entirely to believe that this is cooperative radiation fluorescence oriented from a kind of Couple State of two Yb³⁺ ions' cluster. The up-conversion processes are as follows: First each isolating Yb³⁺ ion absorbs pumping photon energy and is excited to ²F_5/2 state from ²F_7/2 ground state. Then two Yb³⁺ ions, which are both in ²F_5/2 excited state, form a kind of Couple State of cluster (formula available in paper). And then the 474 nm fluorescence would be radiated from excited state (formula available in paper) of cluster's Couple State to its ground state (formula available in paper). The similar mechanism has not been reported internationally up to now.

Citation Download Citation

Xiaobo Chen, Guangyin Zhang, N. Sawanobori, Yinguan Sun, and Meixian X. Li "Up-conversion cooperative radiation fluorescence oriented from a kind of couple state of cluster", Proc. SPIE 3942, Rare-Earth-Doped Materials and Devices IV, (13 April 2000); https://doi.org/10.1117/12.382873

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