Laser state active controlling is challenging under the influence of inherent loss and other nonlinear effects in ultrafast systems. Seeking an extension of degree of freedom in optical devices based on low-dimensional materials may be a way forward. Herein, the anisotropic quasi-one-dimensional layered material Ta₂PdS₆ was utilized as a saturable absorber to modulate the nonlinear parameters effectively in an ultrafast system by polarization-dependent absorption. The polarization-sensitive nonlinear optical response facilitates the Ta₂PdS₆-based mode-lock laser to sustain two types of laser states, i.e., conventional soliton and noise-like pulse. The laser state was switchable in the single fiber laser with a mechanism revealed by numerical simulation. Digital coding was further demonstrated in this platform by employing the laser as a codable light source. This work proposed an approach for ultrafast laser state active controlling with low-dimensional material, which offers a new avenue for constructing tunable on-fiber devices.

在超快系统固有损耗和其他非线性效应的影响下，激光状态主动控制具有挑战性。寻求基于低维材料的光学器件的自由度扩展可能是一个前进的方向。在此，利用各向异性准一维层状材料Ta ₂ PdS ₆作为可饱和吸收体，通过偏振相关吸收有效地调制超快系统中的非线性参数。偏振敏感的非线性光学响应有利于Ta ₂ PdS ₆基锁模激光器维持两种类型的激光态，即常规孤子和类噪声脉冲。单光纤激光器中的激光状态是可切换的，其机制通过数值模拟揭示。通过采用激光作为可编码光源，数字编码在该平台中得到了进一步演示。这项工作提出了一种利用低维材料进行超快激光状态主动控制的方法，为构建可调谐光纤器件提供了新途径。