论文部分内容阅读
设计了一种基于双空气孔光子晶体光纤(PCF)模间干涉的光学电压传感的实验方案。用缠绕了双孔光子晶体光纤的石英晶体作为电压传感头,在被测高压电场的作用下,双孔光子晶体光纤的长度因石英晶体的逆压电效应形变而受到调制,进而可以改变模间干涉输出两个边瓣的光强分布,对两个干涉输出边瓣进行探测实现对高电压的测量。在低压端用一个缠绕了双孔光子晶体光纤的压电陶瓷(PZT)来调整模间初始相位差,使之处于正交状态。实验结果表明,在实验室条件下能获得0.5%的测量精度,具有很好的线性度。
An experimental scheme of optical voltage sensing based on inter-mode interference of double-air-hole photonic crystal fiber (PCF) was designed. Using quartz crystal wound with two-hole photonic crystal fiber as the voltage sensor head, the length of the double-hole photonic crystal fiber is modulated by the inverse piezoelectric effect of the quartz crystal under the action of the high-voltage electric field under measurement, and then the mode Interference output light intensity distribution of the two side lobes, the two interference output side lobe detection to achieve high voltage measurements. In the low-voltage end with a wound double-hole photonic crystal fiber piezoelectric ceramic (PZT) to adjust the initial phase difference between the mold, so that it is in an orthogonal state. Experimental results show that under laboratory conditions can get 0.5% of the measurement accuracy, with good linearity.