温度和电场作用下保偏光纤对方位传递的影响

Influence of Polarization-Maintaining Fibers on Azimuth Transmission Under Variable Temperature and Electric Field

针对基于保偏光纤的非通视方位传递系统中温度与电场引起的方位传递误差,从非通视方位传递系统的工作原理出发,分别推导了基于温度、电场作用保偏光纤的方位角解算模型,并仿真分析了保偏光纤长度、热膨胀系数及电场振幅等因素对方位传递精度的影响。实验结果表明,当温度为20℃时,方位角解算误差对温度不敏感;当温度高于20℃时,方位角解算误差容易受温度、保偏光纤长度的影响,可通过调整保偏光纤的热膨胀系数、泊松比控制方位传递误差。电场大小和电场作用长度共同影响方位角解算误差,当作用角度为45°时,电场振幅不会产生方位角解算误差。该研究结果对保偏光纤非通视方位传递系统的环境适应性研究及系统测量精度的提高具有一定的指导意义。

Given the azimuth transmission errors caused by temperature and electric fields in the non-line-of-sight azimuth transmission system based on polarization-maintaining fibers,we derive azimuth calculation models for polarization-maintaining fibers under the action of a variable temperature and electric field,respectively,from the perspective of the working principle of the non-line-of-sight azimuth transmission system.We also simulate and analyze the influences of the length and thermal expansion coefficient of the polarization-maintaining fibers and the electric field amplitude on the azimuth transmission accuracy.The experimental results show that when the temperature is 20℃,the azimuth solution error is not sensitive to temperature,whereas when the temperature is higher than 20℃,it is significantly affected by temperature and the length of the polarization-maintaining fibers.The azimuth transmission error can be controlled by adjusting the thermal expansion coefficient and Poisson's ratio of the polarization-maintaining fibers.The azimuth solution error is affected by both the electric field magnitude and the length of the polarization-maintaining fibers within the electric field.When the action angle is 45°,the electric field amplitude will not produce an azimuth solution error.The conclusion of the study is of guiding significance for studying the environmental adaptability and improving the system measurement accuracy of non-line-of-sight azimuth transmission systems based on polarization-maintaining fibers.