本文从等效波片的观点出发,详细介绍了等效波于片的弯曲单模光纤圈,以及由几个这样的光纤圈的组合,通过简单的扭转装置来控制单模光纤中传输光偏振态的自调节原理与技术。实验证明,采用本文设计的调节系统完全可以取代经典波片,从而实现单模光纤中传输光束偏振态的自调效果。 In this paper, from the viewpoint of equivalent wave plate, the bending single-mode fiber ring equivalent to the wave plate is introduced in detail and the combination of several such fiber rings is used to control the polarization of the transmitted light in the single-mode fiber by a simple twisting device State self-regulation principle and technology. Experiments show that the control system designed in this paper can completely replace the classical wave plate so as to realize the self-tuning effect of polarization state of transmitted light in single-mode fiber.