Optical Fiber Humidity Sensor Based on Lossy Mode Resonances

Hernáez, Miguel; Zamarreño, Carlos R.; Villar, Ignacio Del; Arregui, Francisco J.; Matı́as, Ignacio R.

doi:10.21307/ijssis-2017-373

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…The maximum variation observed is 0.7 nm in both devices. This hysteresis is attributed to the properties of the material used for the thin-film, in this case ITO [25].…”

Section: Characterization Of the Relative Humidity (Rh) Sensormentioning

confidence: 99%

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Fuentes

Corres

Matı́as

et al. 2019

J. Lightwave Technol.

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Lossy mode resonances (LMRs) are typically obtained with optical fibre. The Kretschmann configuration is an alternative but LMRs are generated with angles approaching grazing incidence. In this work, a new setup is explored, based on the lateral incidence of light on conventional planar waveguides such as glass slides or coverslips. Indium tin oxide was deposited onto both types of waveguides generating LMRs. The results of the simulations carried out agree well with the experimental results. As an example of the potential of this new and simple optical configuration, a humidity sensor with a sensitivity of 0.212 nm/%RH in the range from 65 to 90% of RH was developed, which expedites the development of other types of sensors already explored with LMR based optical fibre sensors.

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“…The maximum variation observed is 0.7 nm in both devices. This hysteresis is attributed to the properties of the material used for the thin-film, in this case ITO [25].…”

Section: Characterization Of the Relative Humidity (Rh) Sensormentioning

confidence: 99%

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Fuentes

Corres

Matı́as

et al. 2019

J. Lightwave Technol.

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“…The construction was stopped when the first LMR was placed at a spectral position which was inside the range of the OSA. The position of the LMR wavelength varies as the refractive index of the external medium changes [3,16] and by varying the relative humidity, the refractive index of the external medium as well as the refractive index of the SnO2 coating varies. The change of the refractive index of the coating is explained by the adsorbed water on the oxide surface [27,28] that occurs within the SnO2 structure.…”

Section: Humidity Responsementioning

confidence: 99%

“…This condition is that the real part of the thin-film permittivity is positive and higher in magnitude than both its own imaginary part and the real part permittivity of the materials surrounding the thin-film [10]. There is a wide variety of materials that can be used to generate LMRs, e.g., polymers and semiconductors, allowing fabricating optical fiber sensor for multiple applications [10][11][12][13][14][15][16][17]. Generation of LMRs on single mode optical fiber (SMF) has generally been done with tapered optical fibers [17,19] as the way to get access to the evanescent field.…”

Section: Introductionmentioning

confidence: 99%

High sensitivity humidity sensor based on cladding-etched optical fiber and lossy mode resonances

Ascorbe

Corres

Matı́as

2016

Sensors and Actuators B: Chemical

Self Cite

106

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In this work a high sensitivity optical fiber humidity sensor (OFHS) is presented. The configuration chosen for this purpose is a cladding-etched single mode optical fiber (CE-SMF) coated with a thin film of tin oxide (SnO2). The etching has been made using hydrofluoric acid (HF) and the coating has been fabricated by means of sputtering. Tin oxide was used to build the nano-coating which produces the Lossy Mode Resonance (LMR) and works as sensitive material. Theoretical and experimental results are shown and compared. The device was tested using a climatic chamber in order to obtain the response of the OFHS to relative humidity. Changes greater than 130 nm have been obtained for relative humidity varying from 20% to 90%, which gives a sensitivity of 1.9 nm/%RH.

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“…Use of optical fibers as sensors for measurement of various parameters is gaining its importance in recent times [10,11]. Fiber Bragg Grating (FBG) sensors are one among the popular sensor elements used for a wide range of measurements.…”

Section: Principle Of Fiber Bragg Grating Sensorsmentioning

confidence: 99%

Measurement of Stress-Strain Response of a Rammed Earth Prism in Compression Using Fiber Bragg Grating Sensors

Prasad¹,

Anitha²,

Rao³

et al. 2011

International Journal on Smart Sensing and Intelligent Systems

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A comparative study of strain response and mechanical properties of rammed earth prisms, has been made using Fiber Bragg Grating (FBG) sensors (optical) and clip-on extensometer (electro-mechanical). The aim of this study is to address the merits and demerits of traditional extensometer vis-à-vis FBG sensor; a uni-axial compression test has been performed on a rammed earth prism to validate its structural properties from the stress -strain curves obtained by two different methods of measurement. An array of FBG sensors on a single fiber with varying Bragg wavelengths ( B ), has been used to spatially resolve the strains along the height of the specimen. It is interesting to note from the obtained stress-strain curves that the initial tangent modulus obtained using the FBG sensor is lower compared to that obtained using clip-on extensometer. The results also indicate that the strains measured by both FBG and extensometersensor follow the same trend and both the sensors register the maximum strain value at the same time.

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Optical Fiber Humidity Sensor Based on Lossy Mode Resonances

Cited by 7 publications

References 13 publications

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

High sensitivity humidity sensor based on cladding-etched optical fiber and lossy mode resonances

Measurement of Stress-Strain Response of a Rammed Earth Prism in Compression Using Fiber Bragg Grating Sensors

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