Author, as appears in the article.: Yue, Fangxin; Loiko, Pavel; Chen, Mengting; Maria Serres, Josep; Wang, Yicheng; Li, Jiang; Basyrova, Liza; Dunina, Elena; Kornienko, Alexey; Fomicheva, Liudmila; Dai, Shibo; Chen, Zhenqiang; Eun, Ji; Park, Tae Gwan; Rotermund, Fabian; Jambunathan, Venkatesan; Lucianetti, Antonio; Mocek, Tomas; Aguil, Magdalena; Diaz, Francesc; Griebner, Uwe; Petrov, Valentin; Mateos, Xavier;

Department: Química Física i Inorgànica

e-ISSN: 1094-4087

URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier / Serres Serres, Josep Maria

Keywords: Yag Transitions Tm Rare-earth ions Performance Optical-properties Intensities Efficient Crystal-growth Configuration-interaction

Abstract: A transparent Tm:Lu3Al5O12 ceramic is fabricated by solid-state reactive sintering at 1830 degrees C for 30 h using commercial alpha-Al2O3 and Lu2O3/Tm2O3 powders and sintering aids - MgO and TEOS. The ceramic belongs to the cubic system and exhibits a close-packed structure (mean grain size: 21 mu m). The in-line transmission at similar to 1 mu m is 82.6%, close to the theoretical limit. The spectroscopic properties of the ceramic are studied in detail. The maximum stimulated-emission cross-section is 2.37x10(-21) cm(2) at 1749nm and the radiative lifetime of the F-3(4) state is about 10 ms. The modified Judd-Ofelt theory accounting for configuration interaction is applied to determine the transition probabilities of Tm3+, yielding the intensity parameters Omega(2) =2.507, Omega(4) = 1.236, Omega(6) = 1.340 [10(-20) cm(2)] and alpha = 0.196x10(-4) cm. The effect of excited configurations on lower-lying interconnected states with the same J quantum number is discussed. First laser operation is achieved under diode-pumping at 792 nm. A 4 at.% Tm:Lu3Al5O12 ceramic laser generated 3.12 W at 2022-2035nm with a slope efficiency of 60.2%. The ceramic is promising for multi-watt lasers at >2 mu m. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Thematic Areas: Química Optics Odontología Medicina iii Medicina ii Materiais Matemática / probabilidade e estatística Interdisciplinar Engenharias iv Engenharias iii Engenharias ii Ciências biológicas i Ciências agrárias i Ciência da computação Biotecnología Atomic and molecular physics, and optics Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: josepmaria.serres@urv.cat f.diaz@urv.cat xavier.mateos@urv.cat magdalena.aguilo@urv.cat

Author identifier: 0000-0002-4299-538X 0000-0003-4581-4967 0000-0003-1940-1990 0000-0001-6130-9579

Record's date: 2023-09-23

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-28-19-28399&id=438015

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Optics Express. 28 (19): 28399-28413

APA: Yue, Fangxin; Loiko, Pavel; Chen, Mengting; Maria Serres, Josep; Wang, Yicheng; Li, Jiang; Basyrova, Liza; Dunina, Elena; Kornienko, Alexey; Fomicheva (2020). Spectroscopy and diode-pumped laser operation of transparent Tm:Lu3Al5O12 ceramics produced by solid-state sintering. Optics Express, 28(19), 28399-28413. DOI: 10.1364/OE.400802

Article's DOI: 10.1364/OE.400802

Entity: Universitat Rovira i Virgili

Journal publication year: 2020

Publication Type: Journal Publications