High-average-power actively-mode-locked Tm3+ fiber lasers

Michael Eckerle, Christelle Kieleck, Philipp Hübner, Jacek Świderski, Stuart D. Jackson, Gwenael Mazé, Marc Eichhorn*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)


Fiber lasers emitting in the 2 μm wavelength range doped with thulium ions can be used as highly efficient pump sources for nonlinear converters to generate mid-infrared radiation. For spectroscopic purposes, illumination and countermeasures, a broad mid-infrared emission spectrum is advantageous. This can be reached by supercontinuum generation in fibers, e.g. fluoride fibers, which up to now has, however, only been presented with either low average power, complex Raman-shifted 1.55 μm pump sources or multi-stage amplifier pump schemes. Here we present recent results of a new actively-mode-locked single-oscillator scheme that can provide the high-repetition rate sub-ns pump pulses needed for pumping supercontinuum generators. A thulium-doped silica fiber laser is presented that provides > 11 W of average power CW-mode-locked pulses at 38 MHz repetition rate at ∼ 38 ps pulse width. Upgrading the setup to allow Q-switched mode-locked operation yields mode-locked 40 MHz pulses arranged in 60 kHz bunched Q-switch envelopes and thus increases further the available peak power. In this Q-switched mode-locked regime over 5 W of average power has been achieved.

Original languageEnglish
Title of host publicationFiber Lasers IX: Technology, Systems, and Applications
Place of PublicationBellingham, WA
Number of pages8
ISBN (Print)9780819488800
Publication statusPublished - 2012
Externally publishedYes
EventFiber Lasers IX: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: 23 Jan 201226 Jan 2012


OtherFiber Lasers IX: Technology, Systems, and Applications
Country/TerritoryUnited States
CitySan Francisco, CA


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