Integrated-optic fluid sensor using heat transfer
- 1 January 1988
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 27 (1) , 109-113
- https://doi.org/10.1364/ao.27.000109
Abstract
An integrated-optic fluid sensor utilizing the heat-transfer phenomenon is proposed. 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. The temperature changes with the variation of a certain physical property of the fluid when the substrate is steadily heated. The expected characteristics are discussed for measurement of the rarefied gas pressure and the air humidity. Also a humidity sensing experiment was carried out by constructing and testing a device using a LiNbO3 waveguide to confirm its basic performance.Keywords
This publication has 4 references indexed in Scilit:
- Resonant cavity sensor for integrated opticsIEEE Journal of Quantum Electronics, 1985
- Optical-waveguide microdisplacement sensorElectronics Letters, 1982
- Thermal Expansion of Lithium Tantalate and Lithium Niobate Single CrystalsJournal of Applied Physics, 1969
- Dispersion of the Refractive Indices of LiNbO3 Crystal between 20° and 900°CJapanese Journal of Applied Physics, 1967