In this study, titanium disulfide (TiS₂) polyvinyl alcohol (PVA) film-type saturable absorber (SA) is synthesized with a modulation depth of 5.08% and a saturable intensity of 10.62 MW/cm² by liquid-phase exfoliation and spin-coating methods. Since TiS₂-based SA has a strong nonlinear saturable absorption property, two types of optical soliton were observed in a mode-locked Er-doped fiber laser. When the pump power was raised to 67.3 mW, a conventional mode-locked pulse train with a repetition rate of 1.716 MHz and a pulse width of 6.57 ps was generated, and the output spectrum centered at 1556.98 nm and 0.466 nm spectral width with obvious Kelly sidebands was obtained. Another type of mode-locked pulse train with the maximum output power of 3.92 mW and pulse energy of 2.28 nJ at the pump power of 517.2 mW was achieved when the polarization controllers were adjusted. Since TiS₂-based SA has excellent nonlinear saturable absorption characteristics, broad applications in ultrafast photonic are expected.

在这项研究中，通过液相剥离和旋转纺丝法合成了二硫化钛（TiS ₂）聚乙烯醇（PVA）薄膜型可饱和吸收剂（SA），其调制深度为5.08％，饱和强度为10.62 MW / cm ²。涂布方法。自TiS ₂基的SA具有很强的非线性饱和吸收特性，在锁模掺Er光纤激光器中观察到两种类型的孤子。当泵浦功率提高到67.3 mW时，产生了传统的锁模脉冲序列，其重复频率为1.716 MHz，脉冲宽度为6.57 ps，输出光谱集中于1556.98 nm和0.466 nm光谱宽度，具有明显的凯利获得了边带。调整偏振控制器后，获得了另一种锁模脉冲序列，其最大输出功率为3.92 mW，泵浦功率为517.2 mW时，脉冲能量为2.28 nJ。由于基于TiS ₂的SA具有出色的非线性饱和吸收特性，因此有望在超快光子领域得到广泛应用。