Abstract: We study the exfoliation of ultrathin ReS₂ nanosheets from the prepared ReS₂ powder and their application to Q-switched Er-doped fiber laser. XRD, Raman, and XPS spectra confirm the successful preparation of the layered ReS₂. SEM images show that the obtained ReS₂ sheets have lateral size below 200 nm. The thickness of the ReS₂ nanosheets is smaller than 5 nm according to the AFM results. ReS₂/PVA film is applied as a saturable absorber in an Er-doped q-switched fiber laser, and a minimum pulse duration of 2.4 μs and an output power of 1.25 mW are obtained, indicating the potential application to Q-switched lasers.

二硫化铼超薄纳米片的制备及其在调Q掺铒光纤激光器中的应用

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