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Preparation of multimode fiber grating by microprocessing modification and their temperature sensing properties

机译：微加工改性制备多模光纤光栅及其感温特性

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摘要

The excimer laser was used to perform precise machining of optic fiber to form FBG for fiber optic sensing. The influence of various H_2-loading conditions to the photosensitivity of fiber and performance of FBG have been studied, and the temperature sensing properties of the FBG have been investigated. The results show that the photosensitivity of the fiber is determined by hydrogen concentration and the refractive index changes of fiber increases dramatically with the increase of treatment times and finally become saturated. Therefore, the grating reflectivity of the fiber can be controlled by adjusting hydrogen-loading pressure and H_2-loading times. The results also show that when the FBG was used for temperature sensing, the Bragg wavelength of the grating is linearly dependent on the environment temperature and the repeatability is good, which indicate that this kind of FBG are appropriate elements to fabricate fiber optic temperature sensors and their systems.
机译：准分子激光器用于对光纤进行精密加工，以形成用于光纤传感的FBG。研究了各种H_2加载条件对纤维光敏性和FBG性能的影响，并研究了FBG的温度传感特性。结果表明，纤维的光敏性由氢浓度决定，纤维的折射率变化随着处理时间的增加而急剧增加，最终达到饱和。因此，可以通过调节氢加载压力和H_2加载时间来控制光纤的光栅反射率。结果还表明，当使用FBG进行温度感测时，光栅的布拉格波长与环境温度成线性关系，并且重复性良好，这表明这种FBG是制造光纤温度传感器的合适元件。他们的系统。

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