Author, as appears in the article.: Pan Z; Loiko P; Wang Y; Zhao Y; Yuan H; Tang K; Dai X; Cai H; Serres JM; Slimi S; Ben Salem E; Dunina E; Kornienko A; Fomicheva L; Doualan JL; Camy P; Chen W; Griebner U; Petrov V; Aguiló M; Díaz F; Solé RM; Mateos X
Department: Química Física i Inorgànica
URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier / Serres Serres, Josep Maria / Slimi, Sami / Solé Cartañà, Rosa Maria
Keywords: Spectroscopy Optical spectroscopy Operation Microchip laser Laser operation Ions Intensities Holmium ions Growth Garnets Energy transfer Energy Dependence Crystal structure Calcium niobium gallium Absorption
Abstract: © 2020 Elsevier B.V. We report on the growth, structure refinement, optical spectroscopy, continuous wave and femtosecond mode-locked laser operation of a Tm3+,Ho3+-codoped disordered calcium niobium gallium garnet (CNGG) crystal. The 2.64 at.% Tm, 0.55 at.% Ho:CNGG is grown by the Czochralski method. Its cubic structure, sp. gr. Ia3¯d - O10h, a = 12.4952(1) Å, is refined by the Rietveld method revealing a random distribution of Ga3+ and Nb5+ cations over octahedral and tetrahedral sites. The Ho3+ transition probabilities are determined within the Judd-Ofelt theory accounting for an intermediate configuration interaction (ICI). For the 5I7 → 5I8 Ho3+ transition, the maximum stimulated-emission cross-section σSE is 0.47 × 10−20 cm2 at 2080.7 nm. The gain bandwidth of Tm,Ho:CNGG at ∼2 μm is > 150 nm and the thermal equilibrium decay time - 6.80 ms. The Tm3+ ↔ Ho3+ energy transfer parameters are determined. A diode-pumped Tm,Ho:CNGG microchip laser generated 413 mW at 2088.4 nm with a slope efficiency of 15.9%. A continuous wavelength tuning between 1940.3 and 2144.6 nm is demonstrated. Ultrashort pulses as short as 73 fs are achieved at 2061 nm from a Tm,Ho:CNGG laser mode-locked by a GaSb semiconductor saturable absorber mirror at a repetition rate of 89.3 MHz.
Thematic Areas: Química Planejamento urbano e regional / demografia Odontología Metals and alloys Metallurgy & metallurgical engineering Mechanics of materials Mechanical engineering Materials science, multidisciplinary Materials science Materials chemistry Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, physical Biotecnología Astronomia / física Antropologia / arqueologia Administração pública e de empresas, ciências contábeis e turismo
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 09258388
Author's mail: josepmaria.serres@urv.cat sami.slimi@estudiants.urv.cat sami.slimi@estudiants.urv.cat magdalena.aguilo@urv.cat rosam.sole@urv.cat xavier.mateos@urv.cat f.diaz@urv.cat
Author identifier: 0000-0002-4299-538X 0000-0001-6130-9579 0000-0002-5769-4141 0000-0003-1940-1990 0000-0003-4581-4967
Record's date: 2024-10-19
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Alloys And Compounds. 853 (2021): 157100-
APA: Pan Z; Loiko P; Wang Y; Zhao Y; Yuan H; Tang K; Dai X; Cai H; Serres JM; Slimi S; Ben Salem E; Dunina E; Kornienko A; Fomicheva L; Doualan JL; Camy P; (2021). Disordered Tm3+,Ho3+-codoped CNGG garnet crystal: Towards efficient laser materials for ultrashort pulse generation at ∼2 μm. Journal Of Alloys And Compounds, 853(2021), 157100-. DOI: 10.1016/j.jallcom.2020.157100
Entity: Universitat Rovira i Virgili
Journal publication year: 2021
Publication Type: Journal Publications
Repositori URV