Author, as appears in the article.: Tyazhev, A; Loiko, P; Guillemot, L; Kouta, A; Sole, RM; Mateos, X; Aguilo, M; Diaz, F; Dupont, H; Georges, P; Druon, F; Braud, A; Camy, P; Hideur, A
Department: Química Física i Inorgànica
URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier / Solé Cartañà, Rosa Maria
Keywords: Mu-m ytterbium wavelength tm3+ylf laser single-crystals klu(wo4)(2) growth
Abstract: We report on a bulk thulium laser operating on the 3H4 → 3H5 transition with pure upconversion pumping at 1064 nm by an ytterbium fiber laser (addressing the 3F4 → 3F2,3 excited-state absorption (ESA) transition of Tm3+ ions) generating 433 mW at 2291 nm with a slope efficiency of 7.4% / 33.2% vs. the incident / absorbed pump power, respectively, and linear laser polarization representing the highest output power ever extracted from any bulk 2.3 µm thulium laser with upconversion pumping. As a gain material, a Tm3+-doped potassium lutetium double tungstate crystal is employed. The polarized ESA spectra of this material in the near-infrared are measured by the pump-probe method. The possible benefits of dual-wavelength pumping at 0.79 and 1.06 µm are also explored, indicating a positive effect of co-pumping at 0.79 µm on reducing the threshold pump power for upconversion pumping.
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: f.diaz@urv.cat magdalena.aguilo@urv.cat rosam.sole@urv.cat xavier.mateos@urv.cat
Author identifier: 0000-0003-4581-4967 0000-0001-6130-9579 0000-0002-5769-4141 0000-0003-1940-1990
Record's date: 2024-08-03
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Optics Express. 31 (9): 14808-14820
APA: Tyazhev, A; Loiko, P; Guillemot, L; Kouta, A; Sole, RM; Mateos, X; Aguilo, M; Diaz, F; Dupont, H; Georges, P; Druon, F; Braud, A; Camy, P; Hideur, A (2023). Excited-state absorption and upconversion pumping of Tm3+-doped potassium lutetium double tungstate. Optics Express, 31(9), 14808-14820. DOI: 10.1364/oe.487130
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications
Repositori URV