光纤电流传感器的延迟光纤偏振串音误差
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摘要
为了减小保偏延迟光纤偏振串音对光纤电流传感器测量精度的影响,利用琼斯矩阵研究了全光纤电流传感器的偏振耦合误差。简化了保偏延迟光纤的偏振串音模型,并基于简化模型得出了保偏延迟光纤偏振串音与输出的关系。通过理论仿真分别分析了在常温和变温条件下偏振串音对传感器变比的影响。对比实验结果与理论分析结论,验证了简化的偏振串音模型的合理性和仿真结果的正确性。测量了实际保偏延迟光纤偏振串音的温度特性,结果表明:在延迟光纤存在一定偏振串音时,光纤电流传感器的变比误差随电流的增加而增大;电流一定时,延迟光纤串音越高,光纤电流传感器的变比误差越大。最后,给出了满足光纤电流传感器0.2S级误差要求时延迟光纤偏振串音的允许波动范围。
To overcome the effect of polarization-maintaining fiber delay polarization crosstalk on the measuring accuracy of an all Fiber Optical Current Sensor(FOCS),the polarization error of the FOCS was studied by using the Jones matrix.The error model for the polarization-maintaining fiber delay polarization crosstalk was simplified,and the relation between the polarization crosstalk and theoutput was deduced based on the simplified model.The influences of the polarization crosstalk on FOCS's normalized scale ratio under a normal temperature and variable temperatures were analyzed respectively by simulation and analysis.The comparison between the experiment results and theory conclusions show that the simplified model is reasonable and the simulation result is correct.The actual temperature characteristic of the polarization-maintaining fiber delay polarization crosstalk was tested.Experimental results indicate that when there is polarization crosstalk in the fiber delay line,the ratio error of the FOCS is proportional to the current;when the current is constant,the higher the polarization crosstalk is,the higher the FOCS's ratio error is.Finally,the fluctuation range of the fiber delay line polarization crosstalk to meet the 0.2Sclass error of FOCS was put forward.
To overcome the effect of polarization-maintaining fiber delay polarization crosstalk on the measuring accuracy of an all Fiber Optical Current Sensor(FOCS),the polarization error of the FOCS was studied by using the Jones matrix.The error model for the polarization-maintaining fiber delay polarization crosstalk was simplified,and the relation between the polarization crosstalk and theoutput was deduced based on the simplified model.The influences of the polarization crosstalk on FOCS's normalized scale ratio under a normal temperature and variable temperatures were analyzed respectively by simulation and analysis.The comparison between the experiment results and theory conclusions show that the simplified model is reasonable and the simulation result is correct.The actual temperature characteristic of the polarization-maintaining fiber delay polarization crosstalk was tested.Experimental results indicate that when there is polarization crosstalk in the fiber delay line,the ratio error of the FOCS is proportional to the current;when the current is constant,the higher the polarization crosstalk is,the higher the FOCS's ratio error is.Finally,the fluctuation range of the fiber delay line polarization crosstalk to meet the 0.2Sclass error of FOCS was put forward.
引文
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[2]FROSIO G.Reciprocal reflection interferometer for a fiber-optic Faraday current sensor[J].Applied Optics,1994,33(25):6111-6122.
[3]李传生,张春熹,王夏霄,等.反射式Sagnac型光纤电流互感器的关键技术[J].电力系统自动化,2013,37(12):104-108.LI CH SH,ZHANG CH X,WANG X X,et al..Key techniques of reflective sagnac interferometertype fiber optic current transformers[J].Automation of Electric Power Systems,2013,37(12):104-108.(in Chinese)
[4]SHORT S X,TSELIKOV A A,de ARRUDA J U,et al..Imperfect quarter-waveplate compensation in sagnac interferometer-type current sensors[J].Journal of Lightwave Technology,1998,16(7):1212-1219.
[5]SHORT S X,DE ARRUDA J U,TSELIKOW A A,et al..Elimination of birefringence induced scale factor errors in the in-line sagnac interferometer current sensor[J].Journal of Lightwave Technology,1998,16(10):1844-1850.
[6]张朝阳,张春熹,王夏霄,等.光纤电流互感器1/4波片温度误差补偿[J].电工技术学报,2008,23(12):55-59.ZHANG CH Y,ZHANG CH X,WANG X X,et al..Temperature compensation methods of 1/4wave plate for fiber optic current sensor[J].Transactions of China Electrotechnical Society,2008,23(12):55-59.(in Chinese)
[7]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].光学与光电技术,2011,9(4):23-26.WANG J F,LIANG J W,DONG Q M.Study of sensing coil errors in the in-line Sagnac interferometer current transducer[J].Optics&Optoelectronic Technology,2011,9(4):23-26.(in Chinese)
[8]YU J,ZHANG CH X,LI CH SH,et al..Influence of polarization-dependent crosstalk on scale factor in the in-line Sagnac interferometer current sensor[J].Optical Engineering,2013,52(11):117101.
[9]龙亮,钟少龙,徐静,等.微型光纤磁传感器的设计与制作[J].光学精密工程,2013,21(9):2294-2302.LONG L,ZHONG SH L,XU J,et al..Design and fabrication of micro fiber-optic magnetic sensor[J].Opt.Precision Eng.,2013,21(9):2294-2302.(in Chinese)
[10]杨远洪,李莉,蒋大刚,等.高精度保偏光纤拍长测试[J].光学精密工程,2007,15(6):807-811.YANG Y H,LI L,JIANG D G,et al..Precision measurement scheme for beat-length of polarization maintain optical fiber[J].Opt.Precision Eng.,2007,15(6):807-811.(in Chinese)
[11]于强,张琛,何周,等.固胶对光纤线圈热应力干扰双折射的影响[J].中国激光,2011,38(2):170-174.YU Q,ZHANG CH,HE ZH,et al..Influence of coating adhesive on thermal stress interference birefringence of optical fiber[J].Chinese Journal of Lasers,2011,38(2):170-174.(in Chinese)
[12]李绪友,张琛,何周,等.基于偏振耦合理论的光纤陀螺环温度性能研究[J].中国激光,2010,37(4):1053-1057.LI X Y,ZHANG CH,HE ZH,et al..Temperature performance research of fiber optics gyroscope based on polarization coupling theory[J].Chinese Journal of Lasers,2010,37(4):1053-1057.(in Chinese)