Journal ArticleDOI
Fiber-optic sensor for humidity.
TLDR
A novel fiber-optic humidity sensor is described, based on reversible sorption of water from the ambient atmosphere in a porous thin-film interferometer that sits on the tip of a fiber.Abstract:
A novel fiber-optic humidity sensor is described. It is based on reversible sorption of water from the ambient atmosphere in a porous thin-film interferometer that sits on the tip of a fiber. The sorbed water changes the refractive index of the thin films and thus the reflectivity of the interferometer; the resulting modulation of the reflected intensity is detected. The sensor is insensitive to electromagnetic interference and aggressive chemicals and is extremely small (micrometers).read more
Citations
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Journal ArticleDOI
Recent achievements in miniaturised humidity sensors—a review of transduction techniques
TL;DR: A review of miniaturized humidity sensors is presented in this article, focusing on the integration issues and technological challenges of the miniaturised humidity sensors, and focusing on capacitive-, hygrometric-, gravimetric-, optical and integrated sensors.
Journal ArticleDOI
Label-Free Biosensor Arrays Based on Silicon Ring Resonators and High-Speed Optical Scanning Instrumentation
Muzammil Iqbal,Martin A. Gleeson,Bradley Spaugh,Frank Tybor,William Gunn,Michael Hochberg,Tom Baehr-Jones,Ryan C. Bailey,L. Cary Gunn +8 more
TL;DR: A platform for real-time binding assays on sensor arrays based on silicon ring resonators is presented in this article, where an array of 32 sensors is interrogated simultaneously and 24 simultaneous binding curves are produced.
Journal ArticleDOI
Nuclear magnetic resonance spectroscopy.
TL;DR: In this article, Bovey and Jelinsky proposed a two-dimensional nuclear magnetic resonance spectroscopy (2D NMS) method, which is based on the Coupling of Nuclear Spins (CNS).
Journal ArticleDOI
Fibre-optic sensor technologies for humidity and moisture measurement
TL;DR: A review of the use of fiber-optic sensor technologies for humidity sensing is presented in this article, where a brief overview on the basic concept of what is meant by humidity and on conventional detection methods is provided.
Journal ArticleDOI
Carbon Nanotube Based Humidity Sensor on Cellulose Paper
TL;DR: In this article, a humidity sensor on cellulose paper is demonstrated using single-walled carbon nanotubes functionalized with carboxylic acid, which exhibits linear behavior up to a relative humidity of 75% with good repeatability and low hysteresis.
References
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Integrated optical switches and gas sensors
K. Tiefenthaler,W. Lukosz +1 more
TL;DR: This work derived theoretically the ultimate sensitivity limits of the grating devices employed either as switches or as gas sensors, and demonstrated new switching and gas-sensing effects in integrated optics using input and output grating couplers and Bragg reflector gratings with 1200 lines/mm on planar SiO-TiO(2) waveguides.
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A Capacitance Humidity-Sensing Transducer
P. Thoma,J. Colla,R. Stewart +2 more
TL;DR: In this paper, a new capacitance humidity sensor is described that has a design, construction, and material composition that impart a unique combination of properties that makes it an improvement over other capacitance-type humidity sensors.
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Aggregate models of pattern formation
Journal ArticleDOI
Integrated-optic fluid sensor using heat transfer.
TL;DR: An integrated-optic fluid sensor utilizing the heat-transfer phenomenon is proposed and an optical waveguide interferometer is used to convert the temperature of the waveguide surface exposed to the surrounding fluid into an intensity modulated light signal.
Journal ArticleDOI
Analysis of optical bistability through rapid water desorption from hard coatings
TL;DR: In this paper, the mechanism of optical bistability in TiO2/SiO2 nonlinear interference filters is investigated and found to be due to water sorption in the pores of the material.