Optical Fiber Fabry–Perot Humidity Sensor Based on Porous Al<sub>2</sub>O<sub>3</sub> Film

Huang, Chujia; Xie, Weijing; Yang, Minghong; Dai, Jixiang; Zhang, Bo

doi:10.1109/lpt.2015.2454271

Cited by 56 publications

(24 citation statements)

References 15 publications

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“…Other humidity-sensitive materials used in FPIs include semiconductors [77,79], ceramics [80], polymers [81,82], etc. Porous anodic alumina has been studied and a sensitivity of 0.31 nm/%RH was achieved [80].…”

Section: Recent Trends In Optical Fiber Humidity Sensorsmentioning

confidence: 99%

“…Porous anodic alumina has been studied and a sensitivity of 0.31 nm/%RH was achieved [80]. An important factor that must be taken into account when working with porous materials is the required time for complete desorption of water, which can range from a few seconds [82] to 22 minutes [80], depending on the size of the pore, among other factors.…”

Section: Recent Trends In Optical Fiber Humidity Sensorsmentioning

confidence: 99%

“…Previous FPIs were based on changes in the RI of the material due to the water absorbed into the pores [80] and/or onto the metal oxide surface [77,79]. Water-swelling materials change their dimensions when they are subjected to changes of RH.…”

Section: Recent Trends In Optical Fiber Humidity Sensorsmentioning

confidence: 99%

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Recent Developments in Fiber Optics Humidity Sensors

Ascorbe

Corres

Arregui

et al. 2017

Sensors

201

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A wide range of applications such as health, human comfort, agriculture, food processing and storage, and electronic manufacturing, among others, require fast and accurate measurement of humidity. Sensors based on optical fibers present several advantages over electronic sensors and great research efforts have been made in recent years in this field. The present paper reports the current trends of optical fiber humidity sensors. The evolution of optical structures developed towards humidity sensing, as well as the novel materials used for this purpose, will be analyzed. Well-known optical structures, such as long-period fiber gratings or fiber Bragg gratings, are still being studied towards an enhancement of their sensitivity. Sensors based on lossy mode resonances constitute a platform that combines high sensitivity with low complexity, both in terms of their fabrication process and the equipment required. Novel structures, such as resonators, are being studied in order to improve the resolution of humidity sensors. Moreover, recent research on polymer optical fibers suggests that the sensitivity of this kind of sensor has not yet reached its limit. Therefore, there is still room for improvement in terms of sensitivity and resolution.

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Section: Recent Trends In Optical Fiber Humidity Sensorsmentioning

confidence: 99%

Section: Recent Trends In Optical Fiber Humidity Sensorsmentioning

confidence: 99%

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Recent Developments in Fiber Optics Humidity Sensors

Ascorbe

Corres

Arregui

et al. 2017

Sensors

201

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“…One is based on using specific technologies to form porous sensing structures, such as sputtering [4], electro-spinning [5], electron evaporation [6], or layer-by-layer nano-assembly [7,8]. The other type of RH fiber optic sensors involves using humidity sensitive coatings or gels (hydrophilic materials) on the surface or end face of the optical fiber, such as polyvinyl alcohol [9,10], polyethylene glycol [11], chitosan [12,13], polyethylene oxide [14], graphene oxide [15], metallic oxide film [15,16], agar [17][18][19][20] and indium tin oxide [21,22]. This kind of polymer coatings have advantages of good performance [19], reproducibility, and long-term stability [14].…”

Section: Introductionmentioning

confidence: 99%

Relative Humidity Fiber Sensor Based on Multimode Interferometer Coated with Agarose-Gel

2018

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In this work, a relative humidity (RH) sensor based on a structure with multimode interference is proposed and experimentally demonstrated. The multimode sensor is fabricated by fusion splicing a coreless fiber section to a single mode fiber. A hydrophilic agarose gel is coated on the coreless fiber, using the dip coating technique. By changing the surrounding RH, the refractive index of the coated agarose gel will change, causing a wavelength shift of the peak in the reflection spectra. For RH variations in the range between 60.0%RH and 98.5%RH, the sensor presents a maximum sensitivity of 44.2 pm/%RH, and taking in consideration the interrogation system, a resolution of 0.5%RH is acquired. This sensor has a great potential in real time RH monitoring and can be of interest for applications where a control of high levels of relative humidity is required.Coatings 2018, 8, 453 2 of 9 and desorb water, and also to restore a fast equilibrium with atmospheric humidity. Besides that, it is extremely stable, not soluble in water and can be easily handled for device manufacture [23,31].In this work, a multimode interferometer based on a coreless fiber coated with agarose gel is proposed for the detection of RH. The sensor is easy to produce, presents good resolution, particularly for environments with values of RH higher than 60.0%RH. Sensor Fabrication and Operation Principle

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“…Different types ofsensors based on crystal fiber used to determine humidity [5][6][7][8]. Methods for measuring the temperature of optical fibers were shown.…”

mentioning

confidence: 99%

Analysis of the Sensor of Temperature and Humidity Measurement Based on the Optical Fiber

Anar¹,

Wang²,

Baktybayev³

2018

OF THE NATIONAL ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKH

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Optical Fiber Fabry–Perot Humidity Sensor Based on Porous Al₂O₃ Film

Cited by 56 publications

References 15 publications

Recent Developments in Fiber Optics Humidity Sensors

Recent Developments in Fiber Optics Humidity Sensors

Relative Humidity Fiber Sensor Based on Multimode Interferometer Coated with Agarose-Gel

Analysis of the Sensor of Temperature and Humidity Measurement Based on the Optical Fiber

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Optical Fiber Fabry–Perot Humidity Sensor Based on Porous Al2O3 Film

Cited by 56 publications

References 15 publications

Recent Developments in Fiber Optics Humidity Sensors

Recent Developments in Fiber Optics Humidity Sensors

Relative Humidity Fiber Sensor Based on Multimode Interferometer Coated with Agarose-Gel

Analysis of the Sensor of Temperature and Humidity Measurement Based on the Optical Fiber

Contact Info

Product

Resources

About

Optical Fiber Fabry–Perot Humidity Sensor Based on Porous Al₂O₃ Film