Nemova Galina, Kashyap Raman
Department of Engineering Physics, Polytechnique Montréal, P.O. Box 6079, Station Centre-ville, Montréal, QC H3T 1J4, Canada.
Department of Electrical Engineering, Polytechnique Montréal, P.O. Box 6079, Station Centre-ville, Montréal, QC H3T 1J4, Canada.
Sensors (Basel). 2016 Jan 9;16(1):87. doi: 10.3390/s16010087.
We propose and theoretically demonstrate a bottle resonator sensor with a nanoscale altitude and with alength several of hundreds of microns made on the top of the fiber with a radius of tens microns for refractive index and temperature sensor applications. The whispering gallery modes (WGMs) in the resonators can be excited with a taper fiber placed on the top of the resonator. These sensors can be considered as an alternative to fiber Bragg grating (FBG) sensors.The sensitivity of TM-polarized modes is higher than the sensitivity of the TE-polarized modes, but these values are comparable and both polarizations are suitable for sensor applications. The sensitivity ~150 (nm/RIU) can be reached with abottle resonator on the fiber with the radius 10 μm. It can be improved with theuse of a fiber with a smaller radius. The temperature sensitivity is found to be ~10 pm/K. The temperature sensitivity can decrease ~10% for a fiber with a radius r(co) = 10 μm instead of a fiber with a radius r(co) = 100 μm. These sensors have sensitivities comparable to FBG sensors. A bottle resonator sensor with a nanoscale altitude made on the top of the fiber can be easily integrated in any fiber scheme.
我们提出并从理论上证明了一种瓶形谐振器传感器，它具有纳米级高度，长度为数百微米，制作在半径为数十微米的光纤顶部，用于折射率和温度传感应用。谐振器中的回音壁模式（WGMs）可通过放置在谐振器顶部的锥形光纤激发。这些传感器可被视为光纤布拉格光栅（FBG）传感器的替代品。TM偏振模式的灵敏度高于TE偏振模式的灵敏度，但这些值相当，两种偏振都适用于传感应用。对于半径为10μm的光纤上的瓶形谐振器，灵敏度可达150（nm/RIU）。使用半径更小的光纤可提高灵敏度。发现温度灵敏度约为10 pm/K。对于半径r(co)=10μm的光纤，而非半径r(co)=100μm的光纤，温度灵敏度会降低约10%。这些传感器的灵敏度与FBG传感器相当。制作在光纤顶部的具有纳米级高度的瓶形谐振器传感器可轻松集成到任何光纤方案中。
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