材料科学
光纤
芯(光纤)
纤维
光子晶体光纤
光纤传感器
硬包层石英光纤
包层(金属加工)
全硅纤维
复合材料
光电子学
包塑石英纤维
光纤布拉格光栅
作者
A. Makowska,Krzysztof Markiewicz,Lukasz Szostkiewicz,A. Kolakowska,J.D. Fidelus,Tomasz Stańczyk,K. Wysokinski,D. Budnicki,L. Ostrowski,Michal Szymanski,Mariusz Makara,Krzysztof Poturaj,T. Tenderenda,P. Mergo,T. Nasilowski
摘要
Sensors based on fiber optics are irreplaceable wherever immunity to strong electro-magnetic fields or safe operation in explosive atmospheres is needed. Furthermore, it is often essential to be able to monitor high temperatures of over 500°C in such environments (e.g. in cooling systems or equipment monitoring in power plants). In order to meet this demand, we have designed and manufactured a fiber optic sensor with which temperatures up to 900°C can be measured. The sensor utilizes multi-core fibers which are recognized as the dedicated medium for telecommunication or shape sensing, but as we show may be also deployed advantageously in new types of fiber optic temperature sensors. The sensor presented in this paper is based on a dual-core microstructured fiber Michelson interferometer. The fiber is characterized by strongly coupled cores, hence it acts as an all-fiber coupler, but with an outer diameter significantly wider than a standard fused biconical taper coupler, which significantly increases the coupling region’s mechanical reliability. Owing to the proposed interferometer imbalance, effective operation and high-sensitivity can be achieved. The presented sensor is designed to be used at high temperatures as a result of the developed low temperature chemical process of metal (copper or gold) coating. The hermetic metal coating can be applied directly to the silica cladding of the fiber or the fiber component. This operation significantly reduces the degradation of sensors due to hydrolysis in uncontrolled atmospheres and high temperatures.
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