Abstract
We reported on the generation of Q-switched pulse in an Yb-doped fiber laser by using a filmy polyvinyl alcohol (PVA)-based gold nanorods (GNRs) saturable absorber (SA). The GNRs are synthesized through seed-mediated method whose longitudinal surface plasmon resonance (SPR) absorption peak is located at 1038nm. The modulation depth of the GNRs SA is ∼4.06%. By gradually increasing the pump power from 62mW to 128mW, the repetition rate of Q-switched pulse increases from 8.78kHz to 20.78kHz and the pulse duration decreases from 9.43μs to 3.65μs. In addition, the dual-wavelength switchable Q-switched operation was also observed. The obtained results further expand the applications of GNRs SA to the field of Q-switched pulsed fiber lasers at 1.0μm waveband.
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