A highly efficient graphene oxide absorber for Q-switched Nd:GdVO4 lasers
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Published on: June 25, 2020
Yong Gang Wang1, Hou Ren Chen, Xiao Ming Wen
1Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan. chinawygxjw@hotmail.com
Abstract:
We demonstrated that graphene oxide material could be used as a highly efficient saturable absorber for the Q-switched Nd:GdVO4 laser. A novel and low-cost graphene oxide (GO) absorber was fabricated by a vertical evaporation technique and high viscosity of polyvinyl alcohol (PVA) aqueous solution. A piece of GO/PVA absorber, a piece of round quartz, and an output coupler mirror were combined to be a sandwich structure passive component. Using such a structure, 104 ns pulses and 1.22 W average output power were obtained with the maximum pulse energy at 2 µJ and a slope efficiency of 17%.
