Wideband saturable absorption in few-layer molybdenum diselenide (MoSe2) for Q-switching Yb-, Er- and Tm-doped fiber lasers

Abstract

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.

References in corpus (1)

• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2

Cited by in corpus (5)

• Ultrafast pulse generation with black phosphorus
• An all optical phase shifter and switch near 1550nm using tungsten disulfide (WS2) deposited tapered fiber
• Passively Q-switched EDFL using Fe3O4-nanoparticle saturable absorber
• Theory of edge-state optical absorption in two-dimensional transition metal dichalcogenide flakes
• Yb- and Er-doped fiber laser Q-switched with an optically uniform, broadband WS2 saturable absorber