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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Fabrication and modification of temperature FBG sensor: role of optical fiber type and Cu sputtered thickness
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Fabrication and modification of temperature FBG sensor: role of optical fiber type and Cu sputtered thickness

机译：温度FBG传感器的制造和改性：光纤型和Cu溅射厚度的作用

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摘要

This paper presents the effects of optical fiber type and copper coating thickness on fiber Bragg grating (FBG) temperature sensitivity. Three types of FBGs including single-mode, step-index, and graded-index multimode fibers were fabricated via the phase mask writing technique. In the temperature range of 30 degrees C to 80 degrees C, the step-index multimode FBG exhibits the highest temperature sensitivity of 11.8 pm degrees C(-1)compared to single-mode and graded-index multimode FBG with the sensitivities of 10.5 pm degrees C(-1)and 11.4 pm degrees C-1, respectively. The temperature sensitivity of the step-index multimode FBG sensor was further improved through the deposition of copper nanolayer which has a greater thermal expansion coefficient than glass. The FBG probe sputtered with a 759.2 nm-thick copper layer achieves the highest temperature sensitivity of 14.2 pm degrees C(-1)compared to those with 306.5 nm and 562.3 nm-thick copper layers which show the sensitivities of 13.2 pm degrees C(-1)and 13.4 pm degrees C-1, respectively.
机译：本文研究了光纤类型和镀铜层厚度对光纤布拉格光栅（FBG）温度灵敏度的影响。采用相位掩模写入技术制备了单模、阶跃折射率和梯度折射率多模光纤三种类型的FBG。在30摄氏度到80摄氏度的温度范围内，阶跃折射率多模FBG的最高温度灵敏度为11.8 pm摄氏度（-1），而单模和渐变折射率多模FBG的灵敏度分别为10.5 pm摄氏度（-1）和11.4 pm摄氏度（-1）。通过沉积比玻璃具有更大热膨胀系数的铜纳米层，进一步提高了阶跃指数多模FBG传感器的温度灵敏度。溅射759.2 nm厚铜层的FBG探头的最高温度灵敏度为14.2 pm摄氏度（-1），而溅射306.5 nm和562.3 nm厚铜层的FBG探头的温度灵敏度分别为13.2 pm摄氏度（-1）和13.4 pm摄氏度（-1）。

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