Journal
OPTICS EXPRESS
Volume 22, Issue 11, Pages 13244-13249Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.013244
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- Polish Ministry of Science and Higher Education [IP2012 052072]
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In this work we present for the first time, to the best of our knowledge, a stretched-pulse mode-locked fiber laser based on topological insulator. As a saturable absorber (SA) a similar to 0.5 mm thick lump of antimony telluride (Sb2Te3) deposited on a side-polished fiber was used. Such a SA introduced 6% modulation depth with 43% of non-saturable losses, which is sufficient for supporting stretched-pulse mode-locking. The ring laser resonator based on Er-doped active fiber with managed intracavity dispersion was capable of generating ultrashort optical pulses with full width at half maximum (FWHM) of 30 nm centered at 1565 nm. The pulses with duration of 128 fs were repeated with a frequency of 22.32 MHz. (C)2014 Optical Society of America
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