Author, as appears in the article.: Zhang L; Sun S; Lin Z; Lin H; Zhang G; Mateos X; Serres J; Aguiló M; Díaz F; Loiko P; Wang Y; Griebner U; Petrov V; Vilejshikova E; Chen W

Department: Química Física i Inorgànica

URV's Author/s: , / Aguiló Díaz, Magdalena / Mateos Ferré, Xavier

Keywords: Thulium ions Seven tungstates Luminescence Laser operation Judd-ofelt theory Absorption

Abstract: © 2018 Elsevier B.V. Tm3+:Na2La4(WO4)7, a disordered tetragonal scheelite-type tungstate crystal, is grown by the Czochralski method. The polarized absorption, stimulated-emission and gain cross-section spectra are determined. The maximum σSEis 1.62 × 10–20cm2at 1788.6 nm for σ-polarization. The Judd-Ofelt parameters for Tm3+are Ω2= 10.321, Ω4= 0.183 and Ω6= 2.122 [10–20cm2]. The radiative lifetime of the3F4state is 1.63 ms. Raman spectroscopy reveals a maximum phonon energy of 923 cm−1. Laser operation under diode-pumping is achieved with both a-cut and c-cut Tm:Na2La4(WO4)7crystals, reaching a maximum output power for the a-cut of 715 mW at ~ 1937 nm with a slope efficiency of 34%. Microchip laser operation using the c-cut crystal yields a slope efficiency of 41%. The Tm:Na2La4(WO4)7crystal is promising for mode-locked lasers due to its broadband emission.

Thematic Areas: Química Optics Odontología Medicina ii Medicina i Materiais Interdisciplinar General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciência de alimentos Chemistry (miscellaneous) Chemistry (all) Biotecnología Biophysics Biochemistry Atomic and molecular physics, and optics Astronomia / física

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

ISSN: 00222313

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

Author identifier: 0000-0003-4581-4967 0000-0003-1940-1990 0000-0001-6130-9579

Record's date: 2023-10-14

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

Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0022231318307579

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

Papper original source: Journal Of Luminescence. 203 676-682

APA: Zhang L; Sun S; Lin Z; Lin H; Zhang G; Mateos X; Serres J; Aguiló M; Díaz F; Loiko P; Wang Y; Griebner U; Petrov V; Vilejshikova E; Chen W (2018). Crystal growth, spectroscopy and first laser operation of a novel disordered tetragonal Tm:Na2La4(WO4)7tungstate crystal. Journal Of Luminescence, 203(), 676-682. DOI: 10.1016/j.jlumin.2018.07.016

Article's DOI: 10.1016/j.jlumin.2018.07.016

Entity: Universitat Rovira i Virgili

Journal publication year: 2018

Publication Type: Journal Publications