Watt-level ultrafast laser inscribed thulium waveguide lasers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Progress in Quantum Electronics Année : 2020

Watt-level ultrafast laser inscribed thulium waveguide lasers

Résumé

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.
Fichier principal
Vignette du fichier
Revised_manuscript.pdf (1.97 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03142056 , version 1 (07-10-2021)

Identifiants

Citer

Esrom Kifle, Pavel Loiko, Carolina Romero, Javier Rodríguez Vázquez de Aldana, Magdalena Aguiló, et al.. Watt-level ultrafast laser inscribed thulium waveguide lasers. Progress in Quantum Electronics, 2020, 72, pp.100266. ⟨10.1016/j.pquantelec.2020.100266⟩. ⟨hal-03142056⟩
59 Consultations
60 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More