Highly efficient, compact Tm.sup.3+./sup.:RE.sub.2./sub.O.sub.3./sub. (RE = Y, Lu, Sc) sesquioxide lasers based on thermal guiding

0492535 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Loiko, P. - Koopmann, P. - Mateos, X. - Serres, J.M. - Jambunathan, Venkatesan - Lucianetti, Antonio - Mocek, Tomáš - Aguilo, M. - Díaz, F. - Griebner, U. - Petrov, V. - Krankel, Ch.
Highly efficient, compact Tm³⁺:RE₂O₃ (RE = Y, Lu, Sc) sesquioxide lasers based on thermal guiding.
IEEE Journal of Selected Topics in Quantum Electronics. Roč. 24, č. 5 (2018), s. 1-13, č. článku 1600713. ISSN 1077-260X. E-ISSN 1558-4542
Grant CEP: GA MŠMT LO1602; GA ČR GA16-12960S
Institucionální podpora: RVO:68378271
Klíčová slova: solid-state lasers * sesquioxide crystals * thulium doping * thermal lensing
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 4.681, rok: 2018

Cubic sesquioxides, RE2O3, where RE = Y, Lu or Sc, are attractive host crystals for thulium (Tm3+) doping. A comparison of the spectroscopic properties of Tm3+:RE2O3 crystals in terms of transition cross sections and cross-relaxation (CR) efficiency required for efficient upconversion pumping is presented. Thermo-optic properties of Tm3+:RE2O3 crystals (thermal lensing, fractional heat loading, and thermo-optic coefficients) are described. The positive thermal lens, broadband emission, and efficient CR of the Tm:RE2O3 crystals enable the development of compact, highly efficient and power-scalable lasers operating above 2 mu m, based on thermal guiding. Nowadays, Tm:Lu2O3 microchip lasers are capable of generating nearly 5 W of output power at similar to 2.06 mu m with a slope efficiency eta of 67% and in a rod geometry-up to 47.5 W with eta of 59%. For multiwatt output at even longer wavelengths around 2.15 mu m, Tm:Sc2O3 is an interesting candidate.
Trvalý link: http://hdl.handle.net/11104/0286031