Photonic crystal fiber interferometer coated with a PAH/PAA nanolayer as humidity sensor

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• 作者：Diego Lopez-Torres^a ; ^{diego.lopez@unavarra.es}Author Vitae ; Cesar Elosua^a ; ^b ; ^{cesar.elosua@unavarra.es}Author Vitae ; Joel Villatoro^c ; ^d ; ^{agustinjoel.villatoro@ehu.eus}Author Vitae ; Joseba Zubia^c ; ^{joseba.zubia@ehu.es}Author Vitae ; Manfred Rothhardt^e ; ^{manfred.rothhardt@leibniz-ipht.de}Author Vitae ; Kay Schuster^e ; ^{kay.schuster@leibniz-ipht.de}Author Vitae ; Francisco J. Arregui^a ; ^b ; ^{parregui@unavarra.es}Author Vitae
• 关键词：LbL ; layer-by-layer ; PCF ; photonic crystal fiber ; KOH ; potassium hydroxide ; PAH ; poly(allylamine hydrochloride) ; PAA ; poly(acrylic acid) ; RH ; relative humidity ; FFT ; fast Fourier transform ; OSA ; optical spectrum analyzer ; SNR ; signal to noise ratio
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：242
• 期：Complete
• 页码：1065-1072
• 全文大小：2471 K
• 卷排序：242

文摘

The proposed humidity sensor combines LbL method and photonic crystal fiber. LbL allows the thickness of the sensing coating to be optimized at nanometer scale. The coating thickness is kept below the evanescent field penetration depth. Fast Fourier Transform is applied to improve the linearity of the sensor. The sensor is reproducible with long-term stability and a resolution of 0.074%/RH.