光纤Bragg光栅的悬臂梁波长调谐特性研究

Cantilever wavelength tuning characteristic study of fiber Bragg grating

提出了一种适用于古建筑健康监测的光纤光栅中心波长调谐装置,将光纤光栅粘贴于等腰三角形悬臂梁的上下表面,通过螺旋测微器使弹性梁产生应变,实验上得到了6.23nm准无啁啾的中心波长调谐。

A FBG central wavelength tuning method has been put forward to use to monitor historic building. Stick the FBG to the surfaces of isosceles triangular cantilever, and the strain of elastic beam can be measured with a micrometer. Thus 6.23nm chirp-free central wavelength tuning can be obtained.