应变对啁啾光栅特性影响的研究

Study on Strain Effect of Chirped FBG Characterization

对光纤光栅在应力作用下光栅的中心波长、带宽、时延进行了研究,实验中发现光栅的中心波长、带宽随应力改变而呈线性变化,时延的线性度在光栅拉伸时变得更好,时延纹波减小,补偿量减小,光栅的反射率也减小。

The strain effect on fiber Bragg grating (FBG) wavelength, 3 dB bandwidth reflectivity and characterizatin of delay is experimentally studied. Change of the center wavelength and 3 dB bandwidth is linear with the strain, but the reflectivity decreases when the strain increases. Linearity of delay becomes better, root-mean-square deviation of delay ripple reduced and compensation lessens, when the strain increases.