Spectroscopy and efficient laser operation around 2.8 μm of Er:(Lu,Sc)2O3 sesquioxide ceramics

Basyrova, Liza; Loiko, Pavel; Wei, Jing; Wang, Yicheng; Huang, Hui; Дунина, Е. Б.; Корниенко, А. А.; Viana, Bruno; Griebner, Uwe; Petrov, Valentín; Aguiló, Magdalena; Dı́az, Francesc; Mateos, Xavier; Camy, Patrice

doi:10.1016/j.jlumin.2021.118373

Cited by 19 publications

(6 citation statements)

References 59 publications

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“…As the cross‐section formula involves at the same time the branching ratio, the radiative lifetime, the emission intensity, and especially the wavelength to the fifth power, there has been a rebalancing of the respective intensities of the different emission bands with relative cross‐sections of order of magnitude 10 −20 cm 2 . Also, the eye‐safe emission cross‐section had the same order of magnitude with a maximum of 0.5 × 10 −20 cm 2 at ~1554 nm [29–31].…”

Section: Resultsmentioning

confidence: 99%

Luminescence properties of CdF₂ single crystals co‐doped with Er³⁺ and Y³⁺ ions

Boubekri,

Fartas,

Diaf

et al. 2024

Luminescence

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The luminescence properties of erbium and yttrium co‐doped cadmium difluoride with three different concentrations of yttrium were investigated. First, we synthesized single crystal samples with good optical quality using the Bridgman technique. From the optical absorption spectra, recorded at room temperature, both in the ultraviolet–visible and infrared spectral ranges, Judd–Ofelt analysis was performed based on yttrium concentrations to predict the radiative properties of Er3+ luminescent ions. For the 10% optimum concentration of yttrium, a detailed photoluminescence investigation was carried out. We mainly explored green, red, and near‐infrared fluorescence under different excitation wavelengths and presented their highlight spectroscopic characteristics. The desired transitions had relatively high emission cross‐sections both under visible and near‐infrared excitation. Optical gain followed a similar trend. Furthermore, the dynamic fluorescence study showed a significant increase in the measured lifetime under an 800 nm infrared excitation. The upconversion process under an 800 nm excitation produced quantum efficiency greater than 100% due to the contribution of more than one energy transfer mechanism.

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Section: Resultsmentioning

confidence: 99%

Luminescence properties of CdF₂ single crystals co‐doped with Er³⁺ and Y³⁺ ions

Boubekri,

Fartas,

Diaf

et al. 2024

Luminescence

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“…The peak σ abs is 0.34×10 -20 cm 2 at 981.3 nm and the corresponding absorption bandwidth (FWHM) is less than 1 nm and another broader peak is found at 971.1 nm (σ abs = 0.22×10 -20 cm 2 ). The absoprtion spectrum is less structured as compared to that for the (Er 0.07 Y 0.93 ) 2 O 3 ceramic due to the La 3+ codoping inducing additional inhomogeneous spectral broadening similarly to other "mixed" sesquioxde ceramics [28].…”

Section: Optical Spectroscopymentioning

confidence: 91%

Mid-infrared laser operation of (Er_0.07La_0.10Y_0.83)₂O₃ sesquioxide ceramic

Балабанов¹,

Loiko²,

Basyrova³

et al. 2023

Laser Phys. Lett.

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A transparent sesquioxide ceramic (Er0.07La0.10Y0.83)2O3 was fabricated by vacuum sintering at 1780 °C for 3 h with lanthana acting as a sintering additive. It was of single-phase nature (sp. gr. Ia 3 ˉ ) with a close-packed microstructure (average grain size: 17 μm, pore content: 5 ppmv) and high transparency of 80% at 1.1 μm. The La3+ ions induced additional inhomogeneous broadening in the absorption and emission spectra of Er3+ ions. For the 4I11/2→4I13/2 transition, the stimulated-emission cross-section σ SE was 1.06 × 10−20 cm2 at 2719 nm and the luminescence lifetimes of the 4I11/2/4I13/2 states amounted to 2.73/5.91 ms, respectively. A (Er0.07La0.10Y0.83)2O3 ceramic laser generated 300 mW at 2840 nm with a slope efficiency of 27.7% and a laser threshold of only 17 mW.

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“…The criteria for the existence of solid-solutions between two parents are given by the Hume-Rothery rules. "Mixed" host matrices are attractive for doping with trivalent rare-earth ions (RE 3+ ) as they exhibit inhomogeneous spectral broadening of their absorption and emission bands [1,2]. It arises from the composition variation of the nearest-neighbor cationic coordination sphere (the ligand) of the RE 3+ ions.…”

Section: Introductionmentioning

confidence: 99%