OSA Open Access Publishing AgreementZhao, YongguangChen, WeidongWang, LiWang, YichengPan, ZhongbenDai, XiaojunYuan, HualeiCai, HuaqiangZhang, YanBae, Ji EunPark, Tae GwanRotermund, FabianLoiko, PavelSerres, Josep MariaMateos, XavierShen, DeyuanGriebner, UwePetrov, Valentin2022-04-042022-04-042019https://oa.tib.eu/renate/handle/123456789/8562https://doi.org/10.34657/7600Bilayer graphene synthesized by chemical vapor deposition is successfully applied as a saturable absorber (SA) for the passive mode-locking of a Tm,Ho:CLNGG laser at 2093nm. Near transform-limited pulses as short as 70 fs, i.e., 10 optical cycles, are produced at a 89 MHz repetition rate with 69 mW average output power. To the best of our knowledge, these are the shortest pulses ever reported from graphene-SA mode-locked Tm, or Ho-lasers in the 2 µm spectral region, including bulk and fiber lasers.enghttps://www.osapublishing.org/library/license_v1.cfm530Chemical vapor depositionFiber lasersGraphenePassive mode lockingPulse repetition rateSaturable absorbersAverage output powerBilayer GrapheneGarnet lasersMode-lockedOptical cyclesRepetition rateSpectral regionTransform-limited pulseMode-locked fiber lasersArticle