Fs-laser-written erbium-doped double tungstate waveguide laser

0500266 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Kifle, E. - Loiko, P. - Romero, C. - de Aldana, J.R.V. - Rodenas, A. - Jambunathan, Venkatesan - Zakharov, V. - Veniaminov, A. - Lucianetti, Antonio - Mocek, Tomáš - Aguilo, M. - Díaz, F. - Griebner, U. - Petrov, V. - Mateos, X.
Fs-laser-written erbium-doped double tungstate waveguide laser.
Optics Express. Roč. 26, č. 23 (2018), s. 30826-30836. ISSN 1094-4087
Grant CEP: GA MŠMT LO1602; GA ČR GA16-12960S; GA MŠMT EF15_006/0000674; GA MŠMT LM2015086
Grant ostatní: OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institucionální podpora: RVO:68378271
Klíčová slova: erbium * waveguide * double tungstates * femtosecond laser
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.561, rok: 2018

We report on the first erbium (Er3+) doped double tungstate waveguide laser. As a gain material, we studied a monoclinic Er3+:KLu(WO4)2 crystal. A depressed-index buried channel waveguide formed by a 60 µm-diameter circular cladding was fabricated by 3D femtosecond direct laser writing. The waveguide was characterized by confocal laser microscopy, µ-Raman and µ-luminescence mapping, confirming that the crystallinity of the core is preserved. The waveguide laser, diode pumped at 981 nm, generated 8.9 mW at 1533.6 nm with a slope efficiency of 20.9% in the continuous-wave regime. The laser polarization was linear (E || Nm). The laser threshold was at 93 mW of absorbed pump power.
Trvalý link: http://hdl.handle.net/11104/0292374