Monteiro, Catarina S.Pérez Herrera, Rosa AnaSilva, SusanaFrazão, Orlando2024-10-102024-10-102023Monteiro C. S., Herrera, R. P., Silva, S., Frazão, O. (2023) Short pulse generation in erbium-doped fiber lasers using graphene oxide as a saturable absorber. In de Ceglia, D., Raposo, M., Ribeiro, P., Albella P. (Eds.), Proceedings of the 11th International Conference on Photonics, Optics and Laser Technology PHOTOPTICS 2023 (pp. 78-81). Science and Technology Publications, Lda. https://doi.org/10.5220/0011700400003408.978-989-758-632-310.5220/0011700400003408https://academica-e.unavarra.es/handle/2454/52175The use of graphene oxide (GO) as a saturable absorber for short pulses generation in an Erbium-doped fiber laser was studied and demonstrated. The saturable absorber consisted of a thin GO film, with a high concentration of monolayer GO flakes, spray-coated on the end face of a ferrule-connected fiber. By including the saturable absorber in the laser cavity and controlling the intra-cavity polarization, the generation of short-pulsed light was achieved under mode-locking and Q-switching operations. Under mode-locking operation, it was observed a pulse train with a fundamental repetition rate of 1.48 MHz, with a working wavelength centered at 1564.4 nm. In the Q-switch operation, a pulse train with a 12.7 kHz repetition rate and a 14.3 µs pulse duration was attained for a 230-mA pump current. Further investigation showed a linear dependence of the repetition rate with the pump power, attaining frequencies between 12.7 and 14.4 kHz.application/pdfeng© 2023 by SCITEPRESS - Science and Technology Publications, Lda. Under CC license (CC BY-NC-ND 4.0)Fiber laserGraphene oxideSaturable absorptioninfo:eu-repo/semantics/conferenceObject2024-10-10info:eu-repo/semantics/openAccess