光纤菲佐气体压力传感器的波分频分复用方法

设计了一种新的光纤菲佐气体压力传感器,结合波分复用技术和空间频率复用技术,实现了不同腔长的光纤菲佐气体压力传感器的复用.给出了该复用系统的结构,阐述了其工作原理,最后利用实验验证了该方法的可行性.针对该系统中的串扰问题提出了基于参数化谱估计的Pisarenko谐波分解方案,使可复用的传感器腔长差降至100 μm左右,大大提高了系统的复用能力.实验结果表明：该系统在单个传感器气体压力分辨率达0.76% F.S(量程为0~150 kPa),复用的传感器数目可达80个以上,可满足实际工程应用中多点气压测量的需要.

SFDM/CWDM of Fiber-Optic Fizeau Gas Pressure Sensors

A fiber-optic fizeau sensor for gas presure measuremen is described.By using coarse wavelength division multiplexing（CWDM）and spatial-frequency division mulplexing（SFDM）techniques,a large number of sensors array is realized.The structure of the multiplexing system and its working principle are also demonstrated,finally we verify the practicality of our approach via experiment and present a valid dimuldulation scheme based on the Pisarenko Method to minimum the existing cross-talk.The experimental results show that a pressure accuracy of 0.76%F.S over a pressure range of 0~150 kPa is achieved,this system has a potential capability for multiplexing more than 80 sensors,which could meet the need of multi-points gas presure measurement in practical applications.