Abstract
We demonstrated that graphene oxide material could be used as a highly efficient saturable absorber forthe Q-switched Nd:GdVO4 laser. A novel and low-cost graphene oxide (GO) absorber was fabricated by a verticalevaporation technique and high viscosity of polyvinyl alcohol (PVA) aqueous solution. Apiece of GO/PVA absorber, a piece of round quartz, and an output coupler mirror werecombined to be a sandwich structure passive component. Using such a structure, 104 nspulses and 1.22 W average output power were obtained with the maximum pulse energy at2 µJ and a slope efficiency of 17%.
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