Ahmad Zarif Zulkifli, Harith Ahmad, Kavintheran Thambiratnam, Sulaiman Wadi Harun, Noor Hidayah Mohd Yunus
In this article, a Q-switched thulium-doped fluoride fiber (TDFF) laser operated in the S-band with reduced graphene oxide (GO) as saturable absorber (SA) has been demonstrated by experimental means. The excess pump from the TDFF via 1400 nm pumping has been addressed and discussed based on the energy level characteristics of the gain medium. To this end, a laser cavity reconfiguration has been proposed in order to resolve the excess pump issue. Moreover, an efficient preparation technique for reduced GOSA has been demonstrated on the basis of understanding its chemical properties. © 2025 Astro Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Photonics Research Centre, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Universiti Kuala Lumpur British Malaysian Institute, Batu 8, Jalan Sungai Pusu, Gombak,Selangor, 53100, Malaysia; Physics Department, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jalan Semarang 5, Malang, 65456, Indonesia; Physics Department, Kulliyyah of Science International Islamic University Malaysia, Pahang, Kuantan, 25200, Malaysia; Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Communication Technology Section, Universiti Kuala Lumpur British Malaysian Institute, Batu 8, Jalan Sungai Pusu, Gombak, Selangor, 53100, Malaysia
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