摘要
描述了用纤内 Bragg光栅进行动态应变测量研究的意义、原理和方法。提出了两种用纤内 Bragg光栅动态应变测量时进行 Bragg波长偏移量的解调方法 :光干涉相位检测 Bragg光栅反射波长偏移的解调方法和用 DWDM密集波分复用器解调 Bragg波长的方法。前者适用于高频宽带动态应变测量 。
The sense,priciple and method of using the fiber Bragg grating for dynamic strain measurement are described in this paper. Two methods of using the fiber Bragg grating for wavelength shift demodulation are proposed when it is employed in the dynamic strain measurement. One is based on the fiber Mach Zehnder interferometry which is the dynamic phase demodulation suitable for high frequency bandwidth dynamic sensing and measurement and the other is the direct detection of the Bragg wavelength by DWDM with limited frequency bandwidth or medium frequency responding.
出处
《航空计测技术》
2002年第6期3-7,共5页
Aviation Metrology & Measurement Technology
基金
航空科学基金资助项目 (0 1I4 4 0 0 1)
