Author, as appears in the article.: Mateos, X.; Loiko, P.; Serres, J.M.; Tacchini, S.; Tonelli, M.; Veronesi, S.; Parisi, D.; di Lieto, A.; Yumashev, K.; Griebner, U.; Petrov, V.

Department: Química Física i Inorgànica

URV's Author/s: MATEOS FERRÉ, XAVIER; Loiko, P.; Serres, J.M.; Tacchini, S.; Tonelli, M.; Veronesi, S.; Parisi, D.; di Lieto, A.; Yumashev, K.; Griebner, U.; Petrov, V.

Keywords: Linearly polarized Laser threshold Microprocessor chips

Abstract: We report on a detailed comparative study of the spectroscopic and thermo-optic properties of tetragonal Tm:LiLnF4 (Ln = Y, Gd, and Lu) crystals indicating their suitability for highly-efficient microchip lasers diode-pumped at ~791 nm and operating at ~1.91 ¿m. An a-cut 8 at.% Tm:LiYF4 micro-laser generated 3.1 W of linearly polarized output at 1904 nm with a slope efficiency of ¿ = 72% and a laser threshold of only 0.24 W. The internal loss for this crystal is as low as 0.0011 cm-1. For 8 at.% Tm:LiGdF4 and 12 at.% Tm:LiLuF4 lasers, the output power reached ~2 W and ¿ was 65% and 52%, respectively. The thermal lens in all Tm:LiLnF4 crystals is weak, positive and low-astigmatic. The potential for the Tm:LiLnF4 lasers to operate beyond ~2 ¿m due to a vibronic coupling has been proved. The Tm:LiYF4 vibronic laser generated 375 mW at 2026-2044 nm with ¿ = 31%. The Tm:LiLnF4 crystals are very promising for passively Q-switched microchip lasers.

Research group: 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; 0000-0002-4270-0668; 0000-0002-4299-538X; n/a; n/a; 0000-0002-2171-7081; n/a; n/a; n/a; n/a; n/a

Record's date: 2017-03-15

Last page: 854

Journal volume: 7

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

Link to the original source: https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-3-844

Article's DOI: 10.1364/OME.7.000844

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

First page: 844

Publication Type: Article Artículo Article