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Investigation of a cascading core-offset in-line fiber Mach-Zehnder interferometer for refractive index measurement

机译:用于折射率测量的级联芯偏移在线光纤马蹄干涉仪的研究

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A cascading core-offset in-line fiber Mach-Zehnder interferometer (MZI) was proposed to improve the RI sensitivity and eliminate the cross sensitivity between RI and temperature. The sensor was fabricated by cascading a small core-offset inline fiber MZI (the offset displacement is 6|im and interference arm length is 30mm) with a large core-offset in-line fiber MZI (the offset displacement is 40μm and interference arm length is 30mm). By enlarging the offset displacement, the RI sensitivity was improved from -9.177 to 108.326nm/RIU. And the MZIs with two offset displacement offer interference dips with different RI response, by utilizing the interference dips, the simultaneously measurement can be realized to eliminate the cross sensitivity.
机译:提出了一种级联芯偏移在线光纤Mach-Zehnder干涉仪(MZI),以提高RI敏感性并消除RI和温度之间的交叉敏感性。通过级联小芯偏移在线纤维MZI(偏移位移为6 | IM和干涉臂长度为30mm)来制造传感器,具有大的芯偏移在线纤维MZI(偏移位移是40μm和干涉臂长度是30mm)。通过放大偏移位移,RI敏感性从-9.177到108.326nm / Riu提高。通过利用干扰倾斜,具有两个偏移位移的MZIS具有不同RI响应的干扰倾斜,可以实现同时测量以消除交叉灵敏度。

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