光学玻璃电流互感器中互易性问题的理论研究

针对“折返式光路在可使Faraday效应加倍的同时消除线性双折射的影响”的说法，导出了具有折返光路的正交共轭反射式（OCR式）、直接反射式（DR式）及屋脊棱镜反射式（RPR式）光学电流传感器模型的等效传输矩阵.结果表明，当不存在法拉第效应时，OCR式折返光路可以消除线性双折射影响,DR式以及RPR式折返光路不能消除线性双折射的影响；在法拉第效应与双折射同时存在时情况下，上述三种折返光路都不能消除线性双折射的影响.因此，这一说法至少在采用惯常的差除和信号处理方案的光学玻璃电流互感器中是否成立有待商榷.

Theoretical Analysis of Reciprocity Problems in Bulk Glass Optical Current Sensors

Aiming to the idea of that “the Faraday effect will be doubled and the linear birefringence will be eliminated by using a return-back optical path”,the equivalent matrices of Orthoconjugate Reflection (OCR)-typed,Direct Reflection (DR)-typed,and Roof-prism Reflection (RPR)-typed optical current sensor models are derived,respectively. The results show that the OCR-typed return-back optical path can eliminate the effects of the linear birefringence,while the DR-typed and the RPR-typed return-back optical paths can not do that when the Faraday rotation is zero;all of these three return-back optical paths can not eliminate the effects of the linear birefringence when the Faraday rotation is not zero. Therefore,it is worthy to discuss that whether the view of “the Faraday effect will be doubled and the linear birefringence will be eliminated by using a return-back optical path” is correct for the bulk glass optical current sensór employing the conventional“-/+”signal processing scheme.