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Wideband saturable absorption in few-layer molybdenum diselenide (MoSe<inf>2</inf>) for Q-switching Yb-, Er- and Tm-doped fiber lasers

Woodward, RI and Howe, RCT and Runcorn, TH and Hu, G and Torrisi, F and Kelleher, EJR and Hasan, T (2015) Wideband saturable absorption in few-layer molybdenum diselenide (MoSe<inf>2</inf>) for Q-switching Yb-, Er- and Tm-doped fiber lasers. Optics Express, 23. pp. 20051-20061.

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Abstract

© 2015 Optical Society of America. We fabricate a free-standing molybdenum diselenide (MoSe2) saturable absorber by embedding liquid-phase exfoliated few-layer MoSe2 flakes into a polymer film. The MoSe2-polymer composite is used to Q-switch fiber lasers based on ytterbium (Yb), erbium (Er) and thulium (Tm) gain fiber, producing trains of microsecond-duration pulses with kilohertz repetition rates at 1060 nm, 1566 nm and 1924 nm, respectively. Such operating wavelengths correspond to sub-bandgap saturable absorption in MoSe2, which is explained in the context of edge-states, building upon studies of other semiconducting transition metal dichalcogenide (TMD)-based saturable absorbers. Our work adds few-layer MoSe2 to the growing catalog of TMDs with remarkable optical properties, which offer new opportunities for photonic devices.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:58
Last Modified: 25 Jun 2020 08:41
DOI: 10.1364/OE.23.020051