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Updated: Jun 12, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
Integrated-optic fluid sensor using heat transfer
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 LiNbO(3) waveguide to confirm its basic performance.
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Mechanism of heat transfer
Mechanisms of Heat Transfer II
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Mechanisms of Heat Transfer
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant heat.
Thermosensation
Heat Flow and Specific Heat

