Model-based compressed sensing of fiber Bragg grating arrays in the frequency domain

Stefan Werzinger; Michael Gottinger; Sandra Gussner; Sven Bergdolt; Rainer Engelbrecht; Bernhard Schmauss

doi:10.1117/12.2263462

23 April 2017 Model-based compressed sensing of fiber Bragg grating arrays in the frequency domain

Stefan Werzinger, Michael Gottinger, Sandra Gussner, Sven Bergdolt, Rainer Engelbrecht, Bernhard Schmauss

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.

Citation Download Citation

Stefan Werzinger, Michael Gottinger, Sandra Gussner, Sven Bergdolt, Rainer Engelbrecht, and 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); https://doi.org/10.1117/12.2263462

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