Bartnick, M.M.BartnickBharathan, G.G.BharathanGoebel, Thorsten AlbertThorsten AlbertGoebelKrämer, R.G.R.G.KrämerNolte, StefanStefanNolteBrès, C.-S.C.-S.Brès2022-10-122022-10-122022https://publica.fraunhofer.de/handle/publica/42758210.1117/12.26174242-s2.0-85132899954We demonstrate operation of a tunable mode-locked thulium-doped fiber laser, based on a wavelength-selective chirped fiber Bragg grating (CFBG). By applying strain to the CFBG, we shift its reflection band and can thereby tune the emission-wavelength of the fiber laser between 2022 nm and 2042 nm. We obtain a pulse train at 9.4 MHz repetition rate and a pulse duration between 9.0 and 12.8 ps. To the best of our knowledge, we report the first tunable mode-locked thulium-doped fiber laser using a tunable CFBG as wavelength-selective element.en2 micronThulium-doped fiber lasertunable chirped fiber Bragg gratingtunable mode-locked laserconference paper