Author, as appears in the article.: Kifle E; Loiko P; Romero C; Vázquez de Aldana JR; Aguiló M; Díaz F; Camy P; Griebner U; Petrov V; Mateos X
Department: Química Física i Inorgànica
URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier
Keywords: Thermal-lens Slope efficiency Saturable absorber Pumped tm Operation Mu-m Microchip laser Fiber laser Femtosecond Athermal directions
Abstract: © 2020 Elsevier Ltd We report on the first watt-level ultrafast laser inscribed Thulium waveguide (WG) lasers. Depressed-index buried channel WGs with a circular cladding (type III) are produced in monoclinic Tm3+:KLu(WO4)2 crystals. Laser operation is achieved under conventional (3H6 → 3H4) and in-band (3H6 → 3F4) pumping. In the former case, employing a Raman fiber laser emitting at 1679 nm as pump, the continuous-wave Tm channel WG laser generated 1.37 W at 1915–1923 nm with a record-high slope efficiency of 82.7% (with respect to the absorbed pump power), a threshold of only 17 mW and a spatially single-mode output with linear polarization. The WG propagation losses were 0.2 ± 0.3 dB/cm. Passive Q-switching of Tm channel WG lasers is achieved using Cr2+:ZnS and Cr2+:ZnSe saturable absorbers. With Cr2+:ZnS, record-short pulses of 2.6 ns/6.9 μJ at a repetition rate of 8.0 kHz were generated. The developed WGs are promising for compact GHz mode-locked lasers at ~2 μm.
Thematic Areas: Statistical and nonlinear physics Quantum science & technology Physics, applied Optics Engineering, electrical & electronic Electronic, optical and magnetic materials Electrical and electronic engineering Atomic and molecular physics, and optics
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 00796727
Author's mail: magdalena.aguilo@urv.cat xavier.mateos@urv.cat f.diaz@urv.cat
Author identifier: 0000-0001-6130-9579 0000-0003-1940-1990 0000-0003-4581-4967
Record's date: 2024-10-19
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0079672720300203
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Progress In Quantum Electronics. 72 (100266):
APA: Kifle E; Loiko P; Romero C; Vázquez de Aldana JR; Aguiló M; Díaz F; Camy P; Griebner U; Petrov V; Mateos X (2020). Watt-level ultrafast laser inscribed thulium waveguide lasers. Progress In Quantum Electronics, 72(100266), -. DOI: 10.1016/j.pquantelec.2020.100266
Article's DOI: 10.1016/j.pquantelec.2020.100266
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Publication Type: Journal Publications
Repositori URV