标题：Passive Q-switching of femtosecond-laser-written Tm:KLu(WO4)2waveguide lasers by graphene and MoS2saturable absorbers
作者：Kifle, Esrom ;Mateos, Xavier ;zquez ;denas, Airan ;Loiko, Pavel ;Zakharov, Viktor ;Veniaminov, Andrey ;Yu, Haohai ;Zhang, Huaijin ;Chen, Yanxue ;, Mag 更多
作者机构：[Kifle, Esrom ;Mateos, Xavier ;Mateos, Xavier ;Mateos, Xavier ;zquez ;denas, Airan ;Chen, Yanxue ;, Magdalena ;, Magdalena ;az, Francesc ] Físi 更多
会议名称：Solid State Lasers XXVII: Technology and Devices 2018
会议日期：January 29, 2018 - February 1, 2018
来源：Proceedings of SPIE - The International Society for Optical Engineering
摘要：A buried depressed-index channel waveguide with a circular cladding and a core diameter of 40 μm is fabricated in a bulk monoclinic 3 at.% Tm:KLu(WO4)2crystal by femtosecond direct laser writing. In the continuous-wave regime, the Tm waveguide laser generates ∼210 mW at 1849.6 nm with a slope efficiency η of 40.8%. Passively Q-switched operation is achieved by inserting transmission-type 2D saturable absorbers (SAs) based on few-layer graphene and MoS2. Using the graphene-SA, a maximum average output power of ∼25 mW is generated at 1844.8 nm. The pulse characteristics (duration/energy) are 88 ns/18 nJ at a repetition rate of 1.39 MHz.
© 2018 SPIE.