0510605 - FZÚ 2020 RIV NL eng J - Journal Article
Jambunathan, Venkatesan - Mateos, X. - Loiko, P. - Serres, J.M. - Griebner, U. - Petrov, V. - Yumashev, K. - Aguilo, M. - Díaz, E.
Growth, spectroscopy and laser operation of Ho:KY(WO₄)₂.
Journal of Luminescence. Roč. 179, Nov (2016), s. 50-58. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA MŠMT LO1602; GA MPO(CZ) FV10788
Grant - others:AV ČR(CZ) VP17
Institutional support: RVO:68378271
Keywords : double tungstates * holmium * absorption * stimulated-emission * laser
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.686, year: 2016 ; AIS: 0.462, rok: 2016
Method of publishing: Limited access
Result website:
https://doi.org/10.1016/j.jlumin.2016.06.049DOI: https://doi.org/10.1016/j.jlumin.2016.06.049

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.
Permanent Link: http://hdl.handle.net/11104/0301060