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We report the feasibility of vanadium aluminum carbide (V2AlC) for implementation as a saturable absorber (SA) for Q-switched pulse generation in Erbium-doped fiber laser (EDFL) cavity. The V2AlC, a MAX phase material is successfully combined with polyvinyl alcohol (PVA) to form a SA film for use in generating stable Q-switched pulses operating at 1559 nm with a maximum repetition rate of 53.55 kHz and a minimum pulse width of 2.54 μs. The maximum pulse energy equal to 57.14nJ is recorded at a 71.5 mW pump power. To the best of our knowledge, this is the first report of EDFL passive Q-switching using V2AlC absorber. [ABSTRACT FROM AUTHOR]

We successfully demonstrate a Q-switched erbium-doped fiber laser (EDFL) using titanium dioxide (TiO2) coated onto a fiber ferrule as a saturable absorber (SA). The fiber ferrule is immersed into a TiO2 colloid, using the dip-coating method to prepare the SA. Stable pulses operating at 1,565 nm with a 3 dB bandwidth of 1.9 nm are achieved within the pump power range from 63.41 to 104.62 mW. A maximum repetition rate of 72.89 kHz and a pulse energy of 29.91 nJ are respectively generated, while the minimum pulse width is 3.02 μs. To the best of our knowledge, this is the first demonstration of EDFL passive Q-switching using TiO2 colloid. [ABSTRACT FROM AUTHOR]