激光与光电子学进展, 2011, 48 (10): 102303, 网络出版: 2011-08-29
反射式Sagnac干涉光纤电流互感器的传感头误差研究
Study of Sensing Coil Errors in In-Line Sagnac Interferometer Current Transducer
互感器 全光纤电流互感器 琼斯矩阵 线性双折射 圆双折射 transducer fiber optical current transducer Jones matrix linear birefringence circular birefringence
摘要
阐述了反射式Sagnac干涉型电流互感器的原理,对Sagnac型光纤电流互感器进行了深入的理论研究,建立了完整的系统理论模型;对影响互感器测量准确度的各种因素进行了全面的理论分析和仿真研究,得到了这些影响因素对系统响应的作用规律。利用偏振系统的琼斯矩阵对反射式Sagnac干涉型电流互感器的偏振误差进行了研究,并对光纤传感头中的线性双折射、圆双折射对测量准确度的影响进行了模拟分析,从理论上得到了反映影响规律的曲线。从仿真结果来看,传感头中大量的圆双折射可以有效地抑制线性双折射对光纤电流互感器测量准确度的影响。
Abstract
The principle of the in-line Sagnac interferometer current transducer is introduced. The Sagnac fiber-optic current sensor is deeply researched, and the complete system theory model has been established. The factors which affect the measuring precision are comprehensivelly analyzed and simulated. Some rules which influence the system precision are acquired. The polarization errors of the in-line Sagnac interferometer current transducer are studied by using the Jones matrices formalism. The effects of linear and cirular birefringence in the sensing coil on measuring precison are simulated, and curves and typical error data which represent the effecting rules are theoretically acquired. The simulation result shows that the linear birefringence can be restrained by adding a larger amount of circular birefringence in the sensing fiber.
王景飞, 梁京伟, 董前民. 反射式Sagnac干涉光纤电流互感器的传感头误差研究[J]. 激光与光电子学进展, 2011, 48(10): 102303. Wang Jingfei, Liang Jingwei, Dong Qianmin. Study of Sensing Coil Errors in In-Line Sagnac Interferometer Current Transducer[J]. Laser & Optoelectronics Progress, 2011, 48(10): 102303.