High-speed full-spectrum fiber Bragg gratings interrogator system and testing

S. Chadderdon; R. Selfridge; S. Schultz; S. Webb; C. Park; K. Peters; M. Zikry

doi:10.1117/12.885138

17 May 2011 High-speed full-spectrum fiber Bragg gratings interrogator system and testing

S. Chadderdon, R. Selfridge, S. Schultz, S. Webb, C. Park, K. Peters, M. Zikry

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77537Q (2011) https://doi.org/10.1117/12.885138
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

This paper presents a high repetition rate fiber Bragg grating (FBG) interrogation system that is able to capture the entire reflection spectrum at a rate of up to 300 kHz. The system uses a high speed MEMS based tunable optical filter that is driven with a sinusoidal voltage. The time varying FBG reflection spectrum in transmitted through the tunable filter. The time varying signal is then mapped into time varying reflection spectra. This interrogation system is used during two dynamic strain tests, in which the reflection spectra are measured at a repetition rate of 100 kHz. The first test is the impact of a woven carbon composite and the second test is on an electromagnetic railgun.

Citation Download Citation

S. Chadderdon, R. Selfridge, S. Schultz, S. Webb, C. Park, K. Peters, and M. Zikry "High-speed full-spectrum fiber Bragg gratings interrogator system and testing", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77537Q (17 May 2011); https://doi.org/10.1117/12.885138

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