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Opt Lett. 2008 Apr 1;33(7):690-2.

Ultrafast thulium-doped fiber-oscillator with pulse energy of 4.3 nJ.

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  • 1Laser Zentrum Hannover e.V., Hollerithallee, Hannover, Germany. m.engelbrecht@lzh.de


A femtosecond fiber laser based on thulium-doped double-clad silica fiber with an internal dispersion compensation is presented that generates pulses at a center wavelength of 1976 nm with an energy of 4.3 nJ and a duration of 1.2 ps. The dechirped pulse duration is 294 fs. The pulse energy is more than 2 orders of magnitude above the pulse energy demonstrated previously. Mode locking is achieved using additive pulse mode locking, and dispersion compensation is facilitated by a grating stretcher arrangement.

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