Li Shi , Guangzhu Chen , Chun Li , Shanming Li , Chengchun Zhao , Yin Hang
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引用次数: 0
Abstract
A single crystal of LaF3 co-doped with Pr3+ and Er3+ was grown and reported for the first time, to the best of our knowledge. The structure and spectral properties were investigated, and Judd-Ofelt (J-O) calculations were performed. Ω2, Ω4, and Ω6 were calculated to be 1.70 × 10−20 cm2, 0.40 × 10−20 cm2, and 1.13 × 10−20 cm2, respectively, and the fluorescence branching ratio β (4I11/2 → 4I13/2) was 16.82 %. The lifetime of Er3+:4I13/2 decreased from 22.60 to 4.736 ms because of the deactivation effect of Pr3+ on Er3+. Pr3+ effectively attenuated the self-termination effect of Er3+. The first continuous-wave output at 2.7 μm was achieved with an average power of 65 mW, indicating that the Pr,Er:LaF3 crystal is a potential gain medium for mid-infrared lasers.
期刊介绍:
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.