掺杂Ho3+的CNGG晶体光纤的LHPG生长及光学特性

IF 3.6 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-08-27 DOI:10.1016/j.jlumin.2025.121502

Jun Zhang , Jian Liu , Longxin Liu , Chong Xu , Xiaodong Xu , Jun Xu , Kheirreddine Lebbou

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引用次数: 0

摘要

首次成功地利用激光加热基底生长（LHPG）方法生长出了Ho:CNGG晶体光纤。在室温下测量了晶体纤维的吸收光谱、发射光谱和荧光衰减曲线。分别计算了在640 nm和1992 nm附近的吸收截面。应用J-O理论分析了Ho:CNGG晶体光纤的荧光特性。计算强度参数Ωt （t = 2,4,6）、辐射跃迁率、分支比和辐射寿命。Ho:CNGG在2069 nm处表现出强发射，发射截面为3.07 × 10−21 cm2，全宽为最大峰宽（FWHM） 81 nm的一半。测定了Ho3+浓度为0.5 at时样品的荧光寿命。%, 1.0 at。%, 1.5 at。%, 2.0 at。%分别为7.60 ms、7.63 ms、8.15 ms和7.98 ms。结果表明，用LHPG法生长的Ho:CNGG晶体光纤具有作为超短激光系统激光增益介质的潜力。

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Growth by the LHPG technique and optical characterization of Ho3+-doped CNGG crystal fibers

Ho:CNGG crystal fibers have been successfully grown by the laser-heated pedestal growth (LHPG) method for the first time. The absorption spectra, emission spectra, and the fluorescence decay curves of the crystal fibers were measured at room temperature. The absorption cross-sections at around 640 nm and 1992 nm were calculated, respectively. J-O theory was applied to analyze fluorescence properties of the Ho:CNGG crystal fiber. The intensity parameters Ω_t (t = 2, 4, 6), radiative transition rates, branching ratios and radiative lifetime were calculated. Ho:CNGG exhibited strong emission at 2069 nm with a emission cross section of 3.07 × 10⁻²¹ cm² and full width at half the maximum (FWHM) of 81 nm. The measured fluorescence lifetimes for samples with Ho³⁺ concentrations of 0.5 at.%, 1.0 at.%, 1.5 at.%, and 2.0 at.% were determined to be 7.60 ms, 7.63 ms, 8.15 ms, and 7.98 ms, respectively. All the results indicate that Ho:CNGG crystal fiber grown by the LHPG method has potential as a laser gain medium for ultrashort laser system.

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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.