Layered Ta2NiS5 Q-Switcher for Mid-Infrared Fluoride Fiber Laser

We have demonstrated the stable Q-switched Er-doped fluoride fiber laser with the help of the few-layered Ta2NiS5 in the mid-infrared spectral range. We fabricated the mid-infrared saturable absorber mirror (SAM) by depositing the layered Ta2NiS5 on a gold mirror. The layered Ta2NiS5 exhibited saturable absorption behavior with modulation depth 36% and saturation intensity 32.2 GW/cm(2) at 2800 nm, respectively. With the Ta2NiS5 SAM, stable Q-switched pulses around 2.8 mu m wavelength can be delivered with a pulse duration of 1.20 mu s and a repetition rate of 102 kHz under an incident pump power of 860 mW from the ZBLAN fiber laser cavity. The experimental results confirm that Ta2NiS5 has great potentials as broadband saturable absorber in mid-infrared regions, paving the way for the application of low-dimensional ternary chalcogenide in broadband optoelectronic devices.

Automated summary

The stable Q-switched Er-doped fluoride fiber laser was demonstrated with the few-layered Ta2NiS5 in the mid-infrared spectral range, showing great potential for broadband optoelectronic devices. Ta2NiS5 exhibited saturable absorption behavior and could deliver stable Q-switched pulses with specific parameters, paving the way for its application as a saturable absorber in mid-infrared regions.