Humidity sensor based on unsymmetrical U-shaped microfiber with a polyvinyl alcohol overlay

Abstract A relative humidity (RH) sensor based on unsymmetrical U-shaped microfiber (MF) with a polyvinyl alcohol overlay is demonstraded in this paper. The microfiber is fabricated by the flame-heated taper drawing technique from the single-mode fiber (SMF), and then coated a PVA overlay on the surface of this MF. In order to form an interferometer and reduce the size of this sensor to make it conveniently to measure, the sensor is fixed as unsymmetrical U-shaped. The sensor can measure a broad RH interval ranging from 30%RH to 95%RH at room temperature (20 °C). And the proposed sensor with a thinner waist diameter of 3.26 μm can realize the highest RH sensitivity of 186.5 pm/%RH. The experimental results demonstrated that the proposed sensor is expected to be useful in the application of high sensitivity relative humidity measurement.

[1]  H. Fu,et al.  Low Temperature Cross-Sensitivity Humidity Sensor Based on a U-Shaped Microfiber Interferometer , 2017, IEEE Sensors Journal.

[2]  S. Buontempo,et al.  Radiation hard humidity sensors for high energy physics applications using polymide-coated Fiber Bragg Gratings sensors , 2011, 2011 IEEE SENSORS Proceedings.

[3]  H. Yamashita,et al.  Removal of Phosphate from Aqueous Solution Using Layered Double Hydroxide Prepared from Waste Iron-Making Slag , 2016 .

[4]  Yong Zhao,et al.  Review of salinity measurement technology based on optical fiber sensor , 2018 .

[5]  Xinwan Li,et al.  Temperature-Insensitive Microdisplacement Sensor Based on Locally Bent Microfiber Taper Modal Interferometer , 2012, IEEE Photonics Journal.

[6]  H. A. Rafaie,et al.  Relative Humidity Sensor Employing Optical Fibers Coated with ZnO Nanostructures , 2015 .

[7]  Yong Zhao,et al.  Small in-fiber Fabry-Perot low-frequency acoustic pressure sensor with PDMS diaphragm embedded in hollow-core fiber , 2018 .

[8]  Sharath Sriram,et al.  Defining the role of humidity in the ambient degradation of few-layer black phosphorus , 2016 .

[9]  Long Jin,et al.  High-birefringence microfiber Sagnac interferometer based humidity sensor , 2016 .

[10]  Jarmo Verho,et al.  Monitoring pH, temperature and humidity in long-term stem cell culture in CO2 incubator , 2017, 2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA).

[11]  Harith Ahmad,et al.  Relative Humidity Sensing Using a PMMA Doped Agarose Gel Microfiber , 2017, Journal of Lightwave Technology.

[12]  M. Z. Zulkifli,et al.  Humidity sensor based on microfiber resonator with reduced graphene oxide , 2016 .

[14]  Qiang Wu,et al.  Investigation of Humidity and Temperature Response of a Silica Gel Coated Microfiber Coupler , 2016, IEEE Photonics Journal.

[15]  Yong Zhao,et al.  Theoretical analysis of high-sensitive seawater temperature and salinity measurement based on C-type micro-structured fiber , 2018 .

[16]  Hyun Seok Song,et al.  Humidity‐Tolerant Single‐Stranded DNA‐Functionalized Graphene Probe for Medical Applications of Exhaled Breath Analysis , 2017 .

[17]  Arvind Vasan,et al.  Defining humidity test duration for microinverter reliability assessment: A physics-of-failure approach , 2017, 2017 IEEE Applied Power Electronics Conference and Exposition (APEC).

[18]  Yi Li,et al.  Relative Humidity Sensor Based on Microfiber Loop Resonator , 2013 .

[19]  Xueguang Qiao,et al.  A relative humidity sensing probe based on etched thin-core fiber coated with polyvinyl alcohol , 2015 .

[20]  E. Getu,et al.  Biology of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) under different temperature and relative humidity , 2017 .

[21]  Bai-Ou Guan,et al.  Microfiber Bragg Grating Hydrogen Sensors , 2015, IEEE Photonics Technology Letters.

[22]  Yong Zhao,et al.  Review on the graphene based optical fiber chemical and biological sensors , 2016 .

[23]  Yuliya Semenova,et al.  Optical microfiber coupler based humidity sensor with a polyethylene oxide coating , 2015 .

[24]  S. Harun,et al.  Optical humidity sensor based on tapered fiber with multi-walled carbon nanotubes slurry , 2017 .

[25]  Young-Geun Han,et al.  Relative Humidity Sensor Based on an Optical Microfiber Knot Resonator With a Polyvinyl Alcohol Overlay , 2016, Journal of Lightwave Technology.

[26]  Yunjiang Rao,et al.  Miniature interferometric humidity sensors based on silica/polymer microfiber knot resonators , 2011 .

[27]  Q. Meng,et al.  Stable Perovskite Solar Cells based on Hydrophobic Triphenylamine Hole-Transport Materials , 2017 .

[28]  Harith Ahmad,et al.  PMMA microfiber loop resonator for humidity sensor , 2017 .

[29]  Sailing He,et al.  Novel Knob-integrated fiber Bragg grating sensor with polyvinyl alcohol coating for simultaneous relative humidity and temperature measurement. , 2015, Optics express.

[30]  D. Rim,et al.  Resuspension of biological particles from indoor surfaces: Effects of humidity and air swirl. , 2017, The Science of the total environment.

[31]  Tanya M Monro,et al.  Ultra-fast Hygrometer based on U-shaped Optical Microfiber with Nanoporous Polyelectrolyte Coating , 2017, Scientific Reports.

[32]  Ignacio R. Matias.  Transmitted Optical Power through a Tapered Single-Mode Fiber under Dynamic Bending Effects , 2003 .

[33]  Xue Zhao,et al.  Humidity sensing of microfiber Bragg grating , 2015, Other Conferences.

[34]  V. Chang,et al.  Influence of moisturizer and relative humidity on human emissions of fluorescent biological aerosol particles , 2017, Indoor air.

[35]  S. Harun,et al.  A PMMA microfiber loop resonator based humidity sensor with ZnO nanorods coating , 2017 .

[36]  W. Wong,et al.  Polyvinyl alcohol coated photonic crystal optical fiber sensor for humidity measurement , 2012 .