Journal
OPTICS LETTERS
Volume 33, Issue 7, Pages 690-692Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.000690
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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. (C) 2008 Optical Society of America.
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