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Abstract
Tantalum aluminum carbide (${\rm{T}}{{\rm{a}}_4}{\rm{Al}}{{\rm{C}}_3}$) phase ceramic (MAX) material has attracted much attention because of its high conductivity, high strength, corrosion resistance, and good optical properties. However, there are too few reports on lasers with ${\rm{T}}{{\rm{a}}_4}{\rm{Al}}{{\rm{C}}_3}$-based saturable absorbers (SAs). We prepared and characterized a ${\rm{T}}{{\rm{a}}_4}{\rm{Al}}{{\rm{C}}_3}$-based SA whose nonlinear absorption performances were achieved at a 2 µm waveband range and which was used in a passively ${\rm{Q}}$-switched (PQS) Tm:YAP laser. In the PQS mode, a maximum average output power of 0.78 W was achieved with the central output wavelength of 1991.86 nm from a PQS Tm:YAP laser, corresponding to a pulse duration of 926 ns at 143.8 kHz.
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