Solid state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement

Philip Orr; Marcus Perry; Grzegorz Fusiek; Paweł Niewczas

doi:10.1117/12.2026772

20 May 2013 Solid state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement

Philip Orr, Marcus Perry, Grzegorz Fusiek, Paweł Niewczas

Author Affiliations +

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87943X (2013) https://doi.org/10.1117/12.2026772
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

We present a solid-state FBG array interrogator and multiplexer capable of determining absolute FBG wavelengths and of providing high-speed, high-resolution static and dynamic measurements. Using a described procedure, deployable on multiplexing passive-interferometric schemes, the system is able to determine initial sensor wavelengths and thereafter track wavelength changes with interferometric resolution. The scheme allows high-resolution interrogation of FBG sensor arrays to be applied to many industrial applications, where previously the lack of combined absolute and quasistatic wavelength measurement precluded the use of interferometric techniques. Using a preliminary laboratory embodiment, we demonstrate a wavelength determination accuracy of <0.3 nm and a measurement resolution of 10 fm/√Hz, and propose pathways to improved performance and miniaturisation.

Citation Download Citation

Philip Orr, Marcus Perry, Grzegorz Fusiek, and Paweł Niewczas "Solid state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87943X (20 May 2013); https://doi.org/10.1117/12.2026772

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