Abstract

We propose and demonstrate parallel structured optical fiber in-line Fabry–Perot interferometers for high temperature sensing. The device consists of three Fabry–Perot cavities in parallel connection, which allows three independent fringe patterns superimposed at its output, and, as a result, a number of dominant fringe peaks/dips appear, thus enabling unambiguous measurement in a large range. The device is featured with compact size, robust structure, and excellent high temperature sustainability, which makes it promising in extreme environment monitoring.

© 2020 Optical Society of America

Construction of cascaded Fabry–Perot interferometers by four in-fiber mirrors for high-temperature sensing

Jun Deng and D. N. Wang
Opt. Lett. 44(5) 1289-1292 (2019)

Cascaded multiple Fabry–Perot interferometers fabricated in no-core fiber with a waveguide for high-temperature sensing

Qiaohan Wang, Hua Zhang, and D. N. Wang
Opt. Lett. 44(21) 5145-5148 (2019)

Optical fiber surface waveguide with Fabry–Perot cavity for sensing

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Opt. Lett. 45(22) 6186-6189 (2020)

Parallel Fabry-Perot interferometers fabricated on multicore-fiber for temperature and strain discriminative sensing

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Opt. Express 28(3) 3190-3199 (2020)

Angled fiber-based Fabry–Perot interferometer

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Opt. Lett. 45(2) 292-295 (2020)