波长检测技术在温度测量中的应用

提出一种波长检测技术实现温度测量的方法,利用FBG传感器对温度等物理量实施监测,具有测试精度高,应用场合不受限制等特点,当环境参数发生变化时,光纤光栅的有效折射率和光栅周期会受到影响,将引起光纤光栅峰值波长的偏移,依据反射光谱结构的变化,可知道其温度的变化趋势。实验测试结果表明,在温度变化0.1°,波长变化1pm,温度和波长具有良好的线性关系。

Application of wavelength detection in the temperature measure

One method of temperature measure by the technology of wavelength detection is developed which inspects the temperature by use of the FBG real time.This method has the advantages of high precision and no restriction in the application situation.The effective refractive index and the period of the FBG will change with the alteration of the parameters of environment,which will result in the wavelength excursion of the FBG.According to the change of reflex spectrum,we can deduce the trend.The experiment has validated that the reflex spectrum will change 1pm with the 0.1° alteration of the temperature.It is true that there is the linear relation between the change of temperature and the one of the wavelength.