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首页> 外文会议>2015 IEEE International Broadband and Photonics Conference >Refractive index sensor with asymmetrical tapered fiber based on evanescent field sensing
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Refractive index sensor with asymmetrical tapered fiber based on evanescent field sensing

机译：基于van逝场感测的非对称锥形光纤折射率传感器

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摘要

We report and demonstrate a single-mode asymmetric tapered fiber as a refractive index (RI) sensor based on evanescent field sensing. The proposed setup managed to sense the changes of RI when the tapered region was exposed to different concentrations of Sodium chloride (NaCl). This was possible due to the output interference spectrum shifting in response to the changes of RI. Different environmental sensitivities were achieved by manipulating the transition lengths of the tapered fiber. Experimental results depict RI sensitivities of 3914.7 nm/RIU (refractive index unit) and 3395.7 nm/RIU for taper profiles with down-taper transition lengths of 2 mm and 8 mm, respectively, which is higher than previously reported asymmetric taper RI sensors. Such findings may find itself beneficial in low cost, reliable and simplified sensors.
机译：我们报告并演示了基于消逝场感测的单模不对称锥形光纤作为折射率（RI）传感器。当锥形区域暴露于不同浓度的氯化钠（NaCl）时，建议的设置设法感测RI的变化。这可能是由于输出干扰频谱响应RI的变化而发生的。通过控制锥形纤维的过渡长度可以实现不同的环境敏感性。实验结果显示，锥度轮廓的锥度分布分别为2mm和8mm，锥度轮廓的RI灵敏度为3914.7 nm / RIU和3395.7 nm / RIU，这比以前报道的非对称锥度RI传感器要高。这样的发现可能发现自己在低成本，可靠和简化的传感器中是有益的。

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