Author, as appears in the article.: Pan, ZB; Loiko, P; Serres, JM; Yuan, HL; Wang, YC; Wang, L; Zhao, YG; Sole, RM; Aguilo, M; Diaz, F; Camy, P; Chen, WD; Griebner, U; Petrov, V; 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 / Solé Cartañà, Rosa Maria
Keywords: Stimulated emission Luminescence decay Laser operation Holmium ions Aluminate crystals Absorption
Abstract: Tm3+,Ho3+-codoped and compositionally “mixed” disordered Ca(Ga,Lu)AlO4 aluminate crystals are promising materials for ultrashort pulse generation above 2 μm. Their polarized spectroscopic properties are studied and the effect of Lu3+ codoping on the inhomogeneous spectral broadening is verified. The peak stimulated-emission cross-section for the 5I7 → 5I8 Ho3+ transition is 1.05 × 10−20 cm2 at 2000 nm for π-polarization. The Tm3+ ↔ Ho3+ energy-transfer parameters are P28 = 1.42 and P71 = 0.090 [10−22 cm3μs−1] indicating a direct transfer with a thermal equilibrium time of 4.35 ms. The effective gain spectra for the codoped crystal are derived. For σ-polarization, the gain bandwidth at ∼2.04 μm is about 100 nm; particularly for this light polarization, Lu3+ codoping induces a noticeable red-shift of the emission spectra further beyond 2 μm. Using absorption studies at 12 K, the Stark splitting of the Tm3+ and Ho3+ multiplets is resolved. A laser-pumped Tm,Ho:Ca(Ga,Lu)AlO4 laser generated a maximum output power of 763 mW at 2078.6 nm with a slope efficiency of 26.4% and π-polarized emission. A continuous wavelength tuning between 1887.7 and 2127 nm (tuning range: 239.3 nm) was achieved for σ-polarization. Diode-pumped operation of a-cut and c-cut crystals was also studied.
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/
Author's mail: josepmaria.serres@urv.cat f.diaz@urv.cat magdalena.aguilo@urv.cat rosam.sole@urv.cat xavier.mateos@urv.cat
Author identifier: 0000-0002-4299-538X 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
Link to the original source: https://www.sciencedirect.com/science/article/pii/S0022231322009139
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Luminescence. 257
APA: Pan, ZB; Loiko, P; Serres, JM; Yuan, HL; Wang, YC; Wang, L; Zhao, YG; Sole, RM; Aguilo, M; Diaz, F; Camy, P; Chen, WD; Griebner, U; Petrov, V; Mateos, (2023). Tm,Ho:Ca(Gd,Lu)AlO4 crystals: Polarized spectroscopy and laser operation. Journal Of Luminescence, 257(), -. DOI: 10.1016/j.jlumin.2022.119638
Article's DOI: 10.1016/j.jlumin.2022.119638
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications