H. Ahmad, N.M. Gandana, B. Nizamani, N.A.M. Rusni, N. Yusoff
In this work, tunable Q-switched pulses in a praseodymium-doped (Pr3) ZBLAN fiber (PDFF) laser operating in the O-band were demonstrated using a Ti3C2TX/PVA MXene saturable absorber (SA) as a passive modulator. Stable Q-switched operation was achieved at a central wavelength of 1304.06nm, with wavelength tunability of 15nm enabled by a tunable bandpass filter (TBPF). As the pump power increased from 283.8 to 311.9mW, the repetition rate increased linearly from 53.74 to 61.34kHz, while the pulse duration decreased from 3.04 to 2.27μs. A maximum pulse energy of 61.78nJ and an average output power of 3.79mW were obtained at the highest pump power of 311.9mW, corresponding to the pulse peak power of 27.27mW. To the best of the authors' knowledge, this study presents the first demonstration of a tunable Q-switched PDFF-based system to utilize Ti3C2TX/PVA MXene as a passive modulator. © 2026 World Scientific Publishing Company.
Photonics Research Centre, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jalan Semarang 5, Malang, 65145, Indonesia; Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI), Batu 8, Jalan Sungai Pusu, Selangor, 53100, Malaysia; Institute for Advanced Studies, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia
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