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Optical refractometer based on large-core air-clad photonic crystal fibers

机译:基于大芯空气包覆光子晶体光纤的折光仪

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摘要

A large-core air-clad photonic crystal fiber-based sensing structure is described, which is sensitive to refractive index. The sensing head is based on multimodal interference, and relies on a single-mode/large-core air-clad photonic crystal fiber (PCF)/single-mode fiber configuration. Using two distinct large-core air-clad PCF geometries--one for refractive index measurement and the other for temperature compensation, it was possible to implement a sensing head sensitive to refractive index changes in water as induced by temperature variations. The results indicated the high sensitivity of this sensing head to refractive index variations of water, and a resolution of 3.4 X 10~(-5) refractive index units could be achieved.
机译:描述了一种对折射率敏感的基于大芯气包光子晶体光纤的传感结构。感测头基于多模式干扰,并依赖于单模/大芯空气包覆光子晶体光纤(PCF)/单模光纤配置。使用两种截然不同的大芯包覆PCF几何形状-一种用于折射率测量,另一种用于温度补偿,则可以实现对温度变化引起的水中折射率变化敏感的传感头。结果表明,该感测头对水的折射率变化具有很高的灵敏度,可以实现3.4 X 10〜(-5)折射率单位的分辨率。

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