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Growth, spectroscopy and laser operation of Ho:KY(WO.sub.4./sub.).sub.2./sub.
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SYSNO ASEP 0510605 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Growth, spectroscopy and laser operation of Ho:KY(WO4)2 Author(s) Jambunathan, Venkatesan (FZU-D)
Mateos, X. (ES)
Loiko, P. (ES)
Serres, J.M. (ES)
Griebner, U. (DE)
Petrov, V. (DE)
Yumashev, K. (BY)
Aguilo, M. (ES)
Díaz, E. (ES)Number of authors 9 Source Title Journal of Luminescence. - : Elsevier - ISSN 0022-2313
Roč. 179, Nov (2016), s. 50-58Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords double tungstates ; holmium ; absorption ; stimulated-emission ; laser Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects LO1602 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) FV10788 GA MPO - Ministry of Industry and Trade (MPO) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000384384800009 EID SCOPUS 84989835356 DOI 10.1016/j.jlumin.2016.06.049 Annotation Monoclinic Ho:KY(WO4)2 crystals doped with up to 7.5 at.% Ho are grown by the Top Seeded Solution Growth-Slow Cooling method. The evolution of their unit cell parameters in dependence on the Ho doping and temperature is studied. The polarized low-temperature (6 K) optical absorption of the Ho3+ ion is investigated in detail to determine the energy of the Stark sub-levels. Room-temperature absorption, stimulated-emission and gain cross-section spectra of Ho:KY(WO4)2 crystals are derived for polarizations parallel to the principal optical axes, E||Np, Nm and Ng. The maximum absorption cross-section for the 5I8→5I7 transition is 1.60×10−20 cm2 at 1961.0 nm and the maximum stimulated-emission cross-section for the 5I7→5I8 transition is 2.65×10−20 cm2 at 2056.3 nm (for E||Nm). The radiative lifetime of the upper laser level of the Ho3+ ion (5I7) amounts to 4.8 ms. Continuous-wave Ho3+ laser operation is achieved under in-band pumping by a Tm laser at 1946 nm. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2020 Electronic address https://doi.org/10.1016/j.jlumin.2016.06.049
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