In this study, we demonstrated the potential of Nb₂C MXene, which is a member of the MXene family, as a saturable absorber (SA) material in generating ultrafast laser at C-band wavelength region. The fabricated tapered fiber with a diameter of 3.56 μm was coated with Nb₂C MXene to realize the interaction of the evanescent field with the material used, hence induced the generation of mode-locked pulses. The investigation on the nonlinear optical properties of the fabricated SA shows that it had a modulation depth and saturation intensity of 12.94% and 1.1 kW/cm², respectively. The soliton pulse with pulse duration of 0.77 ps at the central wavelength of 1559 nm was successfully generated at the pump power of 90.88 mW upon the insertion of the Nb₂C MXene SA into the EDF laser cavity. The fundamental mode has a repetition rate of 14.12 MHz within pump power ranging from 90 to 473 mW. The maximum output power, pulse energy and peak power obtained from the mode-locked laser was measured to be 3.04 mW, 212.7 pJ and 0.18 kW, respectively. A signal to noise ratio (SNR) of approximately 66.5 dB was obtained, hence suggests that the generated mode-locked fiber laser possess an excellent stability. The present findings would open a window of opportunity to a new device for Nb₂C MXene intended for high-performance mode-locked lasers.

在这项研究中，我们证明了MXene系列成员Nb ₂ C MXene作为可饱和吸收剂（SA）材料在C波段波长区域产生超快激光的潜力。用Nb ₂ C MXene涂覆直径为3.56μm的锥形光纤，以实现van逝场与所用材料的相互作用，从而诱发锁模脉冲的产生。对制成的SA的非线性光学性质的研究表明，其调制深度和饱和强度分别为12.94％和1.1 kW / cm ²。插入Nb ₂后，在90.88 mW的泵浦功率下成功产生了中心波长1559 nm处脉冲持续时间为0.77 ps的孤子脉冲。C MXene SA进入EDF激光腔。基本模式在90至473 mW的泵浦功率范围内具有14.12 MHz的重复频率。从锁模激光器获得的最大输出功率，脉冲能量和峰值功率分别为3.04 mW，212.7 pJ和0.18 kW。获得了大约66.5 dB的信噪比（SNR），因此表明所产生的锁模光纤激光器具有出色的稳定性。本研究结果将为用于高性能锁模激光器的Nb ₂ C MXene新设备打开机会之窗。