Comparative studies of Er3+/Yb3+ co-doped GdCa4O(BO3)3, Gd0.5Y0.5Ca4O(BO3)3 and YCa4O(BO3)3 crystals as 1.55 μm laser materials

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-10 DOI:10.1016/j.jlumin.2025.121246

Chenglong Wang , Xilei Cao , Xinghong Gong , Jianhua Huang , Yanfu Lin , Yidong Huang , Yujin Chen

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引用次数: 0

Abstract

Er³⁺ (1 at%) and Yb³⁺ (20 at%) co-doped GdCa₄O(BO₃)₃, Gd_0.5Y_0.5Ca₄O(BO₃)₃, and YCa₄O(BO₃)₃ crystals were successfully grown by the Czochralski method. Their thermal, spectral, and 1.55 μm laser properties were investigated and compared. The thermal expansion anisotropy of the Er³⁺/Yb³⁺:Gd_0.5Y_0.5Ca₄O(BO₃)₃ crystal is the weakest among the three crystals. The Er³⁺/Yb³⁺:Gd_0.5Y_0.5Ca₄O(BO₃)₃ crystal has the larger absorption cross section at 976 nm and emission cross section at 1545 nm than those of the other two crystals. Caused by the high maximum phonon energy close to 1260 cm⁻¹, the Yb³⁺→Er³⁺ energy transfer efficiency in all crystals is higher than 90 %. Under the identical experimental conditions, 1548 nm continuous-wave laser performance obtained in the Er³⁺/Yb³⁺:Gd_0.5Y_0.5Ca₄O(BO₃)₃ crystal is superior to those of the other two crystals. The results show that the Er³⁺/Yb³⁺:Gd_0.5Y_0.5Ca₄O(BO₃)₃ crystal may be a better 1.55 μm laser gain medium compared with the Er³⁺/Yb³⁺ co-doped GdCa₄O(BO₃)₃ and YCa₄O(BO₃)₃ crystals.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

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.