利用琼斯矩阵理论,建立了非保偏光纤光栅环形激光器偏振特性的简化分析模型。通过实验验证,利用此模型的分析结果与实验结果是一致的。分析表明,采用非保偏光纤制成的激光器,能够得到较稳的功率输出,但偏振态紊乱;而简单地加入起偏器会使激光器的输出功率稳定性发生恶化,而且偏振特性也得不到改善。而要利用非保偏光纤实现单偏振输出,必须对激光器采取特殊的偏振控制措施。

Based on the theory of Jones matrix, a model for the analysis of non-PM fiber ring lasers polarization characteristics was developed. The model was further tested by experiments. From the numerically and experimentally analysis results, it was found that lasers composed of non-PM fiber can achieve stable output but its polarization varied with external perturbation. If polarizer was inserted into the laser cavity, the instability of output and polarization was even more serious. So special polarization control must be performed to obtain single polarization laser output using non-PM fiber.