H. Ahmad, M.A.M. Lutfi, M.Z. Samion, M.K.A. Zaini
Femtosecond fiber lasers with a high peak power are of great interest due to their various real-world applications. This work uses a double-clad ytterbium-doped fiber (DC-YDF) as the gain medium to successfully generate mode-locked pulses with a high peak power of hundreds of kilowatts at the 1 μm wavelength. The pulse width of the mode-locked pulses was as short as 108 fs, with a fundamental frequency of 1.9 MHz. The highest average power output, energy pulse, and peak power of the mode-locked pulses were 114.5 mW, 58.4 nJ, and 540.7 kW, respectively. The mode-locked fiber laser operates at a center wavelength of 1052 nm with normal net-cavity dispersion, which shows characteristics of a dissipative soliton. The mode-locked pulses exhibit good stability, as demonstrated by the measurement of the signal-to-noise ratio (SNR) of 40 dB. It is the very first instance of high-power short pulses mode-locked in the 1 μm range being shown utilizing a DC-YDF with a two-dimensional (2D) material-based saturable absorber (SA) into the laser cavity. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.
Photonics Research Centre, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Physics Department, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Malaysia; Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI), Batu 8, Jln Sungai Pusu, Selangor, 53100, Malaysia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, 65145, Indonesia
