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HEC/PVDF-Coated Micro-Sphere Humidity Sensor Using CNN-Based Barcoding
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DOI：10.1109/LPT.2025.3617015.png)
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Whispering gallery mode (WGM) sensors offer a promising alternative to conventional relative humidity (RH) sensors, due to their high quality (Q) factors and sensitivity to environmental changes. In this work, we demonstrate a WGM microsphere-based RH sensor featuring a 170 mu m diameter resonator coupled with a tapered optical fiber. The resonator was coated with a hydroxyethyl cellulose/polyvinylidene fluoride (HEC/PVDF) composite to enhance humidity sensitivity, resulting in a wavelength shift sensitivity of 0.4 pm/%RH and an attenuation response of 0.125 dB/%RH. The sensor was further utilized to generate a dataset of barcoded spectral responses, which were used to train and test a convolutional neural network (CNN) classifier, achieving an accuracy of 98%.
Keyword:
Humidity
Optical fiber sensors
Optical fiber networks
Optical resonators
Sensitivity
Temperature sensors
Sensors
Resonance
Temperature measurement
Thermal stability
Fiber sensor
HEC/PVDF
humidity sensing
micro-sphere resonator
whispering gallery mode resonator
期刊
I
IF:
2.5
论文数:
273
被引数:
1.5W
机构
引用论文
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