Author, as appears in the article.: X. MATEOS; P. LOIKO; S. Y. CHOI; F. ROTERMUND; J. M. SERRES; M. AGUILÓ; F. DÍAZ; K. YUMASHEV; U. GRIEBNER; V. PETROV
Department: Química Física i Inorgànica
URV's Author/s: MATEOS FERRÉ, XAVIER; P. LOIKO; S. Y. CHOI; F. ROTERMUND; J. M. SERRES; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL; K. YUMASHEV; U. GRIEBNER; V. PETROV
Keywords: Single-walled carbon nanotubes (SWCN) Q switching carbon nanotubes
Abstract: Efficient and power-scalable laser operation of a vibronic Tm3+:KLu(WO4)2 microchip laser at ∼2.13 μm is demonstrated. In the continuous-wave mode under diode pumping at ∼805 nm, this laser generated 1.17 W at 2109-2133 nm with a slope efficiency of 39%. This emission is related to the coupling of the electronic transitions of Tm3+ ions with the stretching vibrations of the WOW oxygen bonds in the monoclinic KLu(WO4)2 crystal host appearing at ∼379, 406, and 450 cm-1. The achieved emission wavelength is longer, to our knowledge, than any previously reported laser based on Tm3+ or Ho3+ doped double tungstate crystals. Passive Q-switching of the vibronic Tm3+:KLu(WO4)2 laser is realized with a single-walled carbon nanotube (SWCNT) based saturable absorber, representing the longest wavelength in this mode of operation. In this regime, the maximum output power reached 0.70 W at 2131 nm, corresponding to a slope efficiency of 29%. The pulse characteristics were 25 ns/1.1 μJ at the pulse repetition frequency of 0.62 MHz. These are, we believe, the shortest pulses ever achieved in any lanthanide-based laser passively Q-switched by carbon nanostructures. A conventional (purely electronic transition) Tm3+:KLu(WO4)2 microchip laser at 1.92 μm Q-switched by the same SWCNTs generated 40 ns/4.0 μJ pulses corresponding to a peak power of 0.1 kW, which is a record value for this type of laser oscillator, to our knowledge.
Research group: Física i Cristal·lografia de Nanomaterials Física i Cristal.lografia de Materials
Thematic Areas: Chemistry Química Química
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0740-3224
Author identifier: 0000-0003-1940-1990; 0000-0002-4270-0668; n/a; n/a; 0000-0002-4299-538X; 0000-0001-6130-9579; 0000-0003-4581-4967; n/a; n/a; n/a
Record's date: 2016-12-01
Last page: D27
Journal volume: 33
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-33-11-D19
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1364/JOSAB.33.000D19
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
First page: D19
Publication Type: Article Artículo Article
Repositori URV