Humidity Sensor Based on a Hollow Core Fiber Anti-Resonant Reflection Optical Waveguide

Abstract

In this paper, a graphene oxide (GO) composite film-coated humidity sensor is proposed based on the hollow core fiber (HCF). A segment of the HCF is spliced between two segments of the single-mode fiber (SMF). The relative humidity (RH) sensing characteristics of the sensor are experimentally investigated by observing the intensity shift of resonant dips in the transmission spectrum, which shows the GO composite film-coated HCF has the good stability in the measurement of humidity. The maximum humidity sensitivity of 0.12 dB/%RH is obtained in the RH range of 30%–78%. The proposed sensor has the advantages of the simple structure, easy fabrication, good stability, and high performance, which can be applied to marine climate detection, tunnel air humidity detection, agricultural testing, and other fields.

References

[[1]] Xie T, Xu Z W, Cai X, Zhang D, Fu H Y. Highly sensitive fiber Bragg grating sensing system based on a dual-loop optoelectronic oscillator with the enhanced vernier effect Journal of Lightwave Technology, 2022, 40(14): 4871-4877.

[[2]] Lin Y, Gong Y, Wu Y, Wu H J. Polyimide-coated fiber Bragg grating for relative humidity sensing Photonic Sensors, 2015, 5: 60-66.

[[3]] Konstantaki M, Pissadakis S, Pispas S, Madamopoulos N, Vainos N A. Optical fiber long-period grating humidity sensor with poly (ethylene oxide)/cobalt chloride coating Applied Optics, 2006, 45(19): 4567-4571.

[[4]] Wang Y L, Liu Y Q, Zou F, Chen J, Mou C B, Wang T Y. Humidity sensor based on a long-period fiber grating coated with polymer composite film Sensors, 2019, 19(10): 2263.

[[5]] Tong R J, Zhao Y, Chen M Q, Peng Y. Relative humidity sensor based on small up-tapered photonic crystal fiber Mach-Zehnder interferometer Sensors and Actuators A: Physical, 2018, 280: 24-30.

[[6]] Wang Y Q, Shen C Y, Lou W M, Shentu F Y. Polarization-dependent humidity sensor based on an in-fiber Mach-Zehnder interferometer coated with graphene oxide Sensors and Actuators B: Chemical, 2016, 234: 503-509.

[[7]] Wang N, Tian W H, Zhang H S, Yu X D, Yin X L, Du Y G, et al.. An easily fabricated high performance Fabry-Perot optical fiber humidity sensor filled with graphene quantum dots Sensors, 2021, 21(3): 806.

[[8]] Li C, Yu X Y, Zhou W, Cui Y B, Liu J, Fan S C. Ultrafast miniature fiber-tip Fabry-Perot humidity sensor with thin graphene oxide diaphragm Optics Letters, 2018, 43(19): 4719-4722.

[[9]] Shao Y, Wang Y, Cao S Q, Huang Y J, Zhang L F, Zhang F, et al.. Mechanism and characteristics of humidity sensing with polyvinyl alcohol-coated fiber surface plasmon resonance sensor Sensors, 2019, 18(7): 2029.

[[10]] Ma Q L, Huang L, Guo Z X, Rossmann T. Spectral shift response of optical whispering-gallery modes due to water vapor adsorption and desorption Measurement Science and Technology, 2010, 21(11): 115206.

[[11]] Mallik A K, Liu D, Kavungal V, Wu Q, Farrell G, Semenova Y. Agarose coated spherical micro resonator for humidity measurements Optics Express, 2016, 24(19): 21216-21227.

[[12]] You B, Lu J Y, Yu C P, Liu T A. Terahertz refractive index sensors using dielectric pipe waveguides Optics Express, 2012, 20(6): 5858-5866.

[[13]] Litchinitser N, Abeeluck A, Headley C, Eggleton B. Antiresonant reflecting photonic crystal optical waveguides Optics Letters, 2002, 27(18): 1592-1594.

[[14]] Pearce G, Wiederhecker G, Poulton C G, Burger S, Russell P S J. Models for guidance in Kagome-structured hollow-core photonic crystal fibers Optics Express, 2007, 15(20): 12680-12685.

[[15]] Cai N, Xia L, Wu Y. Multiplexing of anti-resonant reflecting optical waveguides for temperature sensing based on quartz capillary Optics Express, 2018, 26(25): 33501-33509.

[[16]] Gao R, Jiang Y, Zhao Y. Magnetic field sensor based on anti-resonant reflecting guidance in the magnetic gel-coated hollow core fiber Optics Letters, 2014, 39(21): 6293-6296.

[[17]] Liu D, Ling F, Kumar R, Mallik A K, Tian K, Shen C, et al.. Sub-micrometer resolution liquid level sensor based on a hollow core fiber structure Optics Letters, 2019, 44(8): 2125-2128.

[[18]] Liu D, Li W, Wu Q, Zhao H, Ling F, Tian K, et al.. High sensitivity liquid level sensor for microfluidic applications using a hollow core fiber structure Sensors and Actuators A: Physical, 2021, 332: 113134.

[[19]] Hou M, Zhu F, Wang Y, Wang Y, Liao C, Liu S, et al.. Antiresonant reflecting guidance mechanism in hollow-core fiber for gas pressure sensing Optics Express, 2016, 24(24): 27890-27898.

[[20]] Liu Y, Li P, Zhang N, Zhang X H, Chen S M, Liu Z G, et al.. Fiber-optic evanescent field humidity sensor based on a micro-capillary coated with graphene oxide Optics Materials Express, 2019, 9(11): 4418-4428.

[[21]] Hou M, Wang N, Chen Y, Ou Z, Chen X, Shen F, et al.. Laser-induced graphene coated hollow-core fiber for humidity sensing Sensors and Actuators B: Chemical, 2022, 359: 131530.

[[22]] Wang Y Q, Shen C Y, Lou W M, Shentu F Y. Fiber optic humidity sensor based on the graphene oxide/PVA composite film Optics Communications, 2016, 372: 229-234.

[[23]] Xiao Y, Zhang J, Cai X, Tan S Z, Yu J H, Lu H H, et al.. Reduced graphene oxide for fiber-optic humidity sensing Optics Express, 2014, 22(25): 31555-31567.

[[24]] Gao R, Lu D F, Cheng J, Jiang Y, Jiang L. Optical displacement sensor in a capillary covered hollow core fiber based on anti-resonant reflecting guidance IEEE Journal of Selected Topics in Quantum Electronics, 2016, 23(2): 193-198.

[[25]] Sun W, Zhang X, Yu Y, Yang L, Hou F, Yang Y, et al.. Comparative study on transmission mechanisms in a SMF-capillary-SMF structure Journal of Lightwave Technology, 2020, 38(15): 4075-4085

[[26]] Liu S, Ji Y, Cui L, Sun W, Yang J, Li H. Humidity-insensitive temperature sensor based on a quartz capillary anti-resonant reflection optical waveguide Optics Express, 2017, 25(16): 18929-18939.

[[27]] Hanson G W. Dyadic green’s functions and guided surface waves for a surface conductivity model of graphene Journal of Applied Physics, 2008, 103(6): 064302.

[[28]] Gao R, Lu D F, Cheng J, Jiang Y, Jiang L, Qi Z M. Humidity sensor based on power leakage at resonance wavelengths of a hollow core fiber coated with reduced graphene oxide Sensors and Actuators B: Chemical, 2016, 222: 618-624.

[[29]] Li Z, Henriksen E A, Jiang Z, Hao Z, Martin M C, Kim P, et al.. Dirac charge dynamics in graphene by infrared spectroscopy Nature Physics, 2008, 4(7): 532-535.

[[30]] Jiang B, Bi Z, Hao Z, Yuan Q, Feng D, Zhou K, et al.. Graphene oxide-deposited tilted fiber grating for ultrafast humidity sensing and human breath monitoring Sensors and Actuators B: Chemical, 2019, 293: 336-341.

[[31]] Khijwania S K, Srinivasan K L, Singh J P. An evanescent-wave optical fiber relative humidity sensor with enhanced sensitivity Sensors and Actuators B: Chemical, 2005, 104(2): 217-222.

[[32]] Bariain C, Matias I R, Arregui F J, Lopez-Amo M. Optical fiber humidity sensor based on a tapered fiber coated with agarose gel Sensors and Actuators B: Chemical, 2000, 69(1–2): 127-131.