Open AccessSub-130 fs mode-locked Er-doped fiber laser based on topological insulator
Author(s) -
Jarosław Sotor,
Grzegorz Soboń,
Krzysztof M. Abramski
Publication year - 2014
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.013244
Subject(s) - materials science , fiber laser , optics , saturable absorption , topological insulator , laser , pulse duration , mode locking , pulse width modulation , q switching , full width at half maximum , optoelectronics , wavelength , physics , voltage , quantum mechanics
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 ~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.