Versatile structures of wavelength-dependent bound solitons are obtained based on nonlinear polarization rotation (NPR) mode-locked technology in an anomalous-dispersion fiber laser. After optimizing the intra-cavity birefringence and finely adjusting the operating wavelength of the laser, both the conventional soliton and loosely bound-state soliton pairs can be generated and switched under different operating wavelengths. With the evolution of bound state, the spectral interference fringes show significant changes and the temporal separation between bound solitons varies accordingly. Altering initial settings of laser parameters, wavelength-dependent multiple-soliton bound states are also found experimentally. Moreover, the formation and evolution mechanism of the bound states are explored and analyzed in this work.

基于异常色散光纤激光器中的非线性偏振旋转 (NPR) 锁模技术，获得了波长相关束缚孤子的多功能结构。在优化腔内双折射并微调激光器的工作波长后，可以在不同的工作波长下产生和切换常规孤子和松散束缚态孤子对。随着束缚态的演化，光谱干涉条纹表现出显着的变化，束缚孤子之间的时间间隔也随之变化。改变激光参数的初始设置，还通过实验发现了波长相关的多孤子束缚态。此外，本文还对束缚态的形成和演化机制进行了探索和分析。