Bragg波长精确调控的光纤光栅刻写方法与实验

摘要

利用光纤布拉格光栅（FBG）的轴向应力特性，用同一块相位模板，刻写了Bragg波长分别为1072.955 nm，1071.516 nm，1070.917 nm，1069.863 nm，1068.298 nm 的五支光纤光栅。而后对实验数据进行数据拟合得到拉力与刻写出的光纤光栅中心波长之间的关系。得到的实验拟合曲线与理论曲线十分相近。本文方法具有实现简单、设计灵活和成本低的优点，有很好的应用价值。%According to the axial stress characteristics of fiber Bragg gratings,fiber Bragg gratings with different Bragg-wavelength are written based on a uniform phase mask.Bragg-wavelengths are 1072.955nm,1071.516 nm,1070.917 nm,1069.863 nm,1068.298 nm respectively.The relationship between tension and the centre wavelength of fiber gratings is achieved by fitting experiment datum,the experimental fitting curve with theoretical curve is very similar. This method has the advantages of simple implementation,flexible wavelength design and low-cost fabrication,and it has a good application value.