24 September 1997 Frequency multiplexing of in-fiber Bragg grating sensors using tunable laser
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Abstract
A method of interrogation of a quasi-distributed sensor in the frequency domain is discussed. The sensor consists of a series of pairs of the identical Bragg gratings imprinted in the fiber core along its length. Each pair of the Bragg gratings performs as a low reflective Fabry-Perot interferometer producing a cosine modulated reflection spectrum within a grating's main lobe. The detector signal represents the superposition of the modulated reflection spectra which can be decomposed using the fast Fourier transform.
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Mikhail G. Shlyagin, Serguei V. Miridonov, Diana Tentori, "Frequency multiplexing of in-fiber Bragg grating sensors using tunable laser", Proc. SPIE 3099, Micro-optical Technologies for Measurement, Sensors, and Microsystems II and Optical Fiber Sensor Technologies and Applications, (24 September 1997); doi: 10.1117/12.281246; https://doi.org/10.1117/12.281246
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