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研究了一种基于稀土掺杂材料的新型周期性微拉锥玻璃光纤及其弯曲传感应用技术.该光纤的纤芯和包层分别由两种硅酸铅玻璃材料组成,具有可塑性好和易于形成微拉锥的特点.该传感器的核心敏感体由聚焦的CO2激光束对稀土掺杂光纤进行周期性和等间距加热方式制备.论文以该敏感体为核心,结合精密位置移动平台和光学测量平台,构建了基于强度调制的弯曲传感测量系统.理论研究和实验结果表明,这种弯曲传感测量系统的传输光强灵敏度达到-28.2μW/m,测量误差低于±1%,具备实际的工程应用价值.
A novel periodic micro-tapered glass fiber based on rare earth doped materials and its application in bending sensing are studied.The core and cladding of the fiber are composed of two kinds of lead silicate glass materials respectively, which have the advantages of good plasticity and easy Forming a micro-tapering cone.The core sensitive body of the sensor is prepared by periodically and equidistantly heating the rare earth-doped fiber with a focused CO2 laser beam.The paper takes the sensitive body as the core, combining the precise position moving platform and the optical measurement Platform, a bending sensor measurement system based on intensity modulation is constructed.The theoretical research and experimental results show that the sensitivity of this bending sensor system is -28.2μW / m and the measurement error is less than ± 1% Engineering application value.