Passively Q-Switched Yb³⁺-Doped Fiber Laser With ReS₂ Saturable Absorber

Abstract

Rhenium disulfide (ReS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) is a novel two-dimensional material member in the transition metal dichalcogenides family, which shows unusual saturable absorption properties. A compact and reliable passively Q-switched Yb3+-doped fiber laser at 1047 nm was achieved with ReS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> saturable absorber fabricated by mechanical exfoliation method, which achieved pulse duration decreases from 3.32 to 1.56 μs and the repetition rate increases from 52 to 134 kHz with the pump power from 56 to 200 mW, corresponding to pulse energy and peak power increases from 6.06 to 13.02 nJ and 1.83 to 8.13 mW, respectively. To the best of our knowledge, this is the first report in the 1 μm with ReS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> for short-pulsed generation. Our results prove that layered ReS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> is a new saturable absorber for short-pulsed lasers.