Author, as appears in the article.: Xavier Mateos; Josep Maria Serres; Pavel Loiko; Konstantin Yumashev; Nikolai Kuleshov; Valentin Petrov; Uwe Griebner; Magdalena Aguiló; Francesc Díaz

Department: Química Física i Inorgànica

URV's Author/s: MATEOS FERRÉ, XAVIER; Josep Maria Serres; Pavel Loiko; Konstantin Yumashev; Nikolai Kuleshov; Valentin Petrov; Uwe Griebner; AGUILÓ DÍAZ, MAGDALENA; DÍAZ GONZÁLEZ, FRANCISCO MANUEL

Abstract: Abstract: The concept of Yb-doped double tungstate microchip lasers is verified and scaled to the multi-watt power level. The active element is a 2.6 mm-thick Yb:KLuW crystal cut along the Ng optical indicatrix axis. Maximum continuous-wave output power of 4.4 W is extracted at 1049 nm with a slope efficiency of 65% and an optical-to-optical efficiency of 44% with respect to the absorbed pump power. The laser emission is linearly polarized and the intensity profile is characterized by a near-circular TEM00 mode with M2 x,y < 1.1. Due to low intracavity losses of the microchip laser, laser operation at wavelengths as long as 1063 nm is achieved. The mechanism of the thermal mode stabilization in the microchip cavity is confirmed. At very low resonator losses polarization-switching between E || Nm and Np oscillating states is observed and explained on the basis of spectroscopic and thermal lens characteristics.

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: 2159-3930

Author identifier: 0000-0003-1940-1990; ; ; ; ; ; ; 0000-0001-6130-9579; 0000-0003-4581-4967

Record's date: 2017-05-26

Last page: 667

Journal volume: 5

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.osapublishing.org/ome/abstract.cfm?uri=ome-5-3-661

Funding program: altres; Grups consolidats Generalitat de Catalunya; 2014SGR1358 plan; RETOS; MAT2013-47395-C4-4-R plan; Excelencia; MAT2011-29255-C02- 02

Article's DOI: 10.1364/OME.5.000661

Entity: Universitat Rovira i Virgili

Journal publication year: 2015

First page: 661

Publication Type: Article Artículo Article