可实时动态调控光谱带宽的滤波器在光纤通信、光谱控制及脉宽调控等激光技术领域具有重要应用价值. 例如超短脉冲激光的产生就主要受内腔非线性相移、群速度色散及滤波器光谱带宽等参数影响. 其中，滤波器光谱带宽主要影响激光单脉冲能量、脉冲宽度及光谱带宽等参数. 但是现阶段在超短脉冲激光的产生中所使用的滤波器带宽是固定的，无法实现激光脉冲输出参数实时在线动态调控. 针对现阶段滤波器不能实现激光光谱动态调谐且制作工艺复杂的问题，本文采用偏振敏感器件，将双折射诱导波长相关的偏振态旋转转化为振幅调制，基于琼斯矩阵理论模型开展了可实时调控激光光谱带宽及中心波长的全光纤滤波器理论模拟及设计研究. 该研究为大学物理本科教学和光学实验提供了与科学前沿相结合的实验方案，可拓展教学内容和教学深度，有利于培养学生的科学素养.

Optical Filter can dynamically regulate the spectral bandwidth are of excellent value in laser technology，fiber communication，and other research and application fields. For example，the generation of ultrashort pulsed laser is mainly affected by parameters such as nonlinear phase shift，group velocity dispersion and spectral bandwidth. Among them，the filter bandwidth plays an important role for improving laser parameters such as single pulse energy，pulse width and average power. However，the filter bandwidth used in the generation of ultrashort pulse lasers is fixed，and it is not possible to realize real-time online dynamic tuning of the laser parameters. Aiming at solving the problems that the available filters cannot realize dynamic tuning of the laser spectrum，and the fabrication process is also complicated. This work carries out the theoretical simulation and design of the all-fiber optic filters.