The deactivation effects of Nd3+ ion for 2.85 μm laser in Ho3+/Nd3+ co-doped fluorotellurite glass

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2023-11-09 DOI:10.1016/j.jlumin.2023.120308

Shaohua Feng , Jun Zhu , Chengzhen Liu , Yang Xiao , Liyang Cai , Yantao Xu , Xusheng Xiao , Haitao Guo

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引用次数: 0

Abstract

The 2.85 μm band has garnered significant attention for its wide range of applications in the mid-infrared region, and Ho³⁺ doped fluorotellurite fiber shows great promise as a gain medium for the 2.85 μm fiber laser. To achieve efficient population inversion for Ho³⁺ ions at 2.85 μm, Ho³⁺/Nd³⁺ co-doped fluorotellurite glasses with low hydroxyl were synthesized. The deactivation effect of Nd³⁺ ions to Ho³⁺: ⁵I₇ levels was investigated through emission spectra and lifetime decay curves under 890 nm excitation. The results show that Nd³⁺ ions can effectively quench the Ho³⁺: 2.05 μm emission and help the Ho³⁺: ⁵I₆ → ⁵I₇ transition to overcome the bottleneck of particle population inversion. Ultimately, the particle population inversion corresponding to 2.85 μm luminescence was realized in the Ho³⁺/Nd³⁺ co-doped fluorotellurite glass, and indicates that a maximum of 1.64 W laser at 2.85 μm with a slope efficiency of 8.72 % can be realized under 890 nm pump by numerical simulations.

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Nd3+离子对2.85 μm激光在Ho3+/Nd3+共掺氟碲酸盐玻璃中的失活效应

2.85 μm波段因其在中红外波段的广泛应用而备受关注，而Ho3+掺杂氟碲酸盐光纤作为2.85 μm光纤激光器的增益介质前景广阔。为了在2.85 μm处实现Ho3+离子的有效反转，合成了Ho3+/Nd3+共掺低羟基氟碲酸盐玻璃。在890 nm激发下，通过发射光谱和寿命衰减曲线研究了Nd3+离子对Ho3+: 5I7能级的失活作用。结果表明，Nd3+离子可以有效地淬灭Ho3+: 2.05 μm的发射，帮助Ho3+: 5I6→5I7转变，克服粒子居数反转的瓶颈;最终，在Ho3+/Nd3+共掺氟碲酸盐玻璃中实现了2.85 μm发光对应的粒子数反转，并通过数值模拟表明，在890 nm泵浦下，2.85 μm处可实现最大1.64 W的激光，斜率效率为8.72%。

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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.