光学电压传感器在温度稳定性方面仍有亟待解决的问题，一是电光晶体在温度变化时存在温度梯度，导致表面温度与光路温度不等；二是晶体物性参数也会受到温度影响。为此提出一种基于温度场与双卡尔曼滤波（Dual Kalman，D-Kalman）参数估计的温度补偿方法。以锗酸铋晶体为研究对象，在对传感器输出信号进行交直流分离的基础上，先利用半解析法建立晶体暂态温度场模型，再分别通过卡尔曼滤波与中心差分卡尔曼滤波实现对晶体内部温度和初始温度下晶体折射率的状态估计，最后将修正参数与传感器输出信号高频分量相结合计算补偿电压。实验结果表明，传感器在外界温度为［20 ℃，40 ℃］以0.5 ℃/min速率不断升高的环境下，暂态温度场解析式的仿真精度在0.02%以内，实验测量精度在0.2%左右，补偿输出电压测量精度优于0.52%。与同平台下反向传播神经网络温度补偿效果以及不同平台下的补偿效果相比，该方法提高了传感器测量精度。

Vortex beams with fractional topological charge (FTC) have many special characteristics and novel applications. However, one of the obstacles for their application is the difficulty of precisely determining the FTC of fractional vortex beams. We find that when a vortex beam with an FTC illuminates a dynamic angular double slit (ADS), thefar-field interference patterns that include the information of the FTC of the beam at the angular bisector direction of the ADS vary periodically. Based on this property, a simple dynamic ADS device and data fitting method can be used to precisely measure the FTC of a vortex light beam with an error of less than 5%.