In recent years, two‐dimensional materials have been widely used in the field of optics due to their unique nonlinear optical properties, broadband saturation absorption and ultrafast recovery time. MXene Ti₃C₂T_x is a kind of emerging two‐dimensional materials with large modulation depth, high damage threshold, and excellent electrical conductivity with near zero bandgap structure. However, MXene has seldom been applied in ultrafast photonics, especially the generation of ultrastable soliton molecules. In this paper, MXene is prepared and applied in the erbium‐doped fiber laser. The nonlinear optical properties of MXene Ti₃C₂T_x are studied experimentally. The center wavelength, 3‐dB bandwidth, fundamental frequency and the pulse duration of the conventional soliton are 1566.1 nm, 1.21 nm, 6.09 MHz and 993 fs, respectively. By adjusting the polarization state and pump power, the soliton molecules can be obtained in the laser cavity. Especially, two kinds of soliton molecules with CW peak and without CW peak are observed, respectively. Experimental results show that MXene saturable absorber (SA) can bear a high pump power. This work demonstrates that MXene Ti₃C₂T_x can be used as an excellent SA. Hence, we believe that this kind of optical material has many applications such as optical communication, optical logic gates and nonlinear devices, etc.

中文翻译：

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MXene Ti3C2Tx调制器，可稳定地产生孤子分子

近年来，二维材料因其独特的非线性光学特性，宽带饱和吸收和超快的恢复时间而被广泛用于光学领域。MXene Ti ₃ C ₂ T _x是一种新兴的二维材料，具有大的调制深度，高的损伤阈值和出色的电导率，具有接近零的带隙结构。但是，MXene很少用于超快光子学中，尤其是超稳定孤子分子的产生。在本文中，制备了MXene并将其应用于掺do光纤激光器。MXene Ti ₃ C ₂ T _x的非线性光学性质经过实验研究。传统孤子的中心波长，3 dB带宽，基本频率和脉冲持续时间分别为1566.1 nm，1.21 nm，6.09 MHz和993 fs。通过调整偏振态和泵浦功率，可以在激光腔中获得孤子分子。特别地，分别观察到具有CW峰和不具有CW峰的两种孤子分子。实验结果表明，MXene饱和吸收器（SA）可以承受较高的泵浦功率。这项工作表明，MXene Ti ₃ C ₂ T _x可以用作优良的SA。因此，我们认为这种光学材料具有许多应用，例如光学通信，光学逻辑门和非线性器件等。