In the present work, we proposed a facile strategy to synthesize the Fe₃O₄/Ti₃C₂ MXene composite. The morphology and structures of Fe₃O₄/Ti₃C₂ MXene were investigated to confirm the interaction. Moreover, the conventional open- and closed-aperture (OA/CA) Z-scan experiments were implemented to work out the nonlinear optical properties at 1 μm. The large effective nonlinear absorption coefficient β_eff, nonlinear refractive index n₂, third-order susceptibility |χ⁽³⁾| were −4.39 cm MW⁻¹, -2.9 × 10⁻³ cm² GW⁻¹, 1.5 × 10⁻¹⁰ esu, respectively. In addition, based on the photogenerated carrier separation and transfer model, a set of rate equations was established to interpreter the nonlinear optical dynamics. The recovery lifetimes were estimated in ∼10 ps level, while the carrier separation and transfer times were in sub-ps level. Furthermore, the tapered-microfiber Fe₃O₄/Ti₃C₂ MXene composite was employed as the saturable absorber in the Er-doped fiber laser (EDFL) and the Yb-doped fiber laser (YDFL). In the EDFL, a conventional soliton operation was realized at 1555 nm with a minimum pulse duration of 773 fs and a high signal-to-noise ratio (SNR) of 72 dB. While in the YDFL, a dissipative soliton was achieved with a pulse duration of 677 ps and a high SNR of 82 dB. Our work confirmed that Fe₃O₄/Ti₃C₂ MXene hybrid possesses excellent nonlinear optical properties and benefits the ultrafast photonics applications.

在目前的工作中，我们提出了一种合成 Fe ₃ O ₄ /Ti ₃ C ₂ MXene 复合材料的简便策略。研究了 Fe ₃ O ₄ /Ti ₃ C ₂ MXene的形态和结构以确认相互作用。此外，还实施了传统的开孔和闭孔 (OA/CA) Z 扫描实验以计算 1 μm 处的非线性光学特性。大的有效非线性吸收系数β _eff，非线性折射率n ₂，三阶磁化率|χ ⁽³⁾ | 分别为 -4.39 cm MW ^-1 , -2.9 × 10 ^-3 cm ²  GW ^-1、1.5 × 10 ^-10  esu 分别为。此外，基于光生载流子分离和转移模型，建立了一套速率方程来解释非线性光学动力学。恢复寿命估计在 10 ps 水平，而载流子分离和转移时间在亚 ps 水平。此外，锥形超细纤维 Fe ₃ O ₄ /Ti ₃ C ₂MXene 复合材料被用作掺铒光纤激光器 (EDFL) 和掺镱光纤激光器 (YDFL) 的可饱和吸收体。在 EDFL 中，传统孤子操作在 1555 nm 处实现，最小脉冲持续时间为 773 fs，高信噪比 (SNR) 为 72 dB。而在 YDFL 中，耗散孤子实现了 677 ps 的脉冲持续时间和 82 dB 的高 SNR。我们的工作证实，Fe ₃ O ₄ /Ti ₃ C ₂ MXene 杂化物具有优异的非线性光学特性，有利于超快光子学应用。