23 April 2017 Model-based compressed sensing of fiber Bragg grating arrays in the frequency domain
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103236H (2017) https://doi.org/10.1117/12.2263462
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Abstract
We propose a model-based compressed sensing (MBCS) of FBG arrays (FBGA), interrogated with wavelength scanning incoherent optical frequency domain reflectometry. This method measures the frequency response of a FBGA with an electrical vector network analyzer combined with a tunable laser. Instead of the usual inverse discrete Fourier transform (IDFT), we apply a direct estimation of the grating reflectivities with a simple frequency domain model. A reconstruction of 10 gratings spaced by 20 cm is demonstrated. MBCS allows to reduce the number of measurement frequencies from 120 to 8, compared to an IDFT, while using a bandwidth of just 500 MHz.
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Stefan Werzinger, Michael Gottinger, Sandra Gussner, Sven Bergdolt, Rainer Engelbrecht, Bernhard Schmauss, "Model-based compressed sensing of fiber Bragg grating arrays in the frequency domain", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103236H (23 April 2017); doi: 10.1117/12.2263462; https://doi.org/10.1117/12.2263462
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