Spectral tag method for enhancing FBG multiplexing capability

Ki-Sun Choi; Ju-Youn Son; Geun-Jin Kim; Kyung-Shin Lee; Dong-Young Park; Se-Jong Baik; Jae-Soon Youn; Kiegon Im; Jae-Min Kim; Young-Sang Kim

doi:10.1117/12.762371

5 February 2008 Spectral tag method for enhancing FBG multiplexing capability

Ki-Sun Choi, Ju-Youn Son, Geun-Jin Kim, Kyung-Shin Lee, Dong-Young Park, Se-Jong Baik, Jae-Soon Youn, Kiegon Im, Jae-Min Kim, Young-Sang Kim

Author Affiliations +

Proceedings Volume 6890, Optical Components and Materials V; 689013 (2008) https://doi.org/10.1117/12.762371
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Fiber Bragg gratings (FBGs) have been frequently employed for the strain and temperature measurement in many distributed sensor systems. For multipoint measurements with a very large number of measurement points such as smart structure applications, the multiplexing of FBG sensors is one of the most detrimental techniques to reduce both installation and operation cost for multipoint measurements. We proposed a new method of increasing the multiplexing capability of a multipoint FBG sensor system without increasing the system complexity by providing a unique spectral response to each FBG at a different location as an identification tag. FBG elements were fabricated to furnish reflectance spectrums to have a multi peaked structure. The number of sensors in the present spectral tag method increases as a multiple power of N, the number of spectral code. The free spectral range available for spanning the parameter to be measured is as wide as a substantial fraction of the whole spectral bandwidth of the system.

Citation Download Citation

Ki-Sun Choi, Ju-Youn Son, Geun-Jin Kim, Kyung-Shin Lee, Dong-Young Park, Se-Jong Baik, Jae-Soon Youn, Kiegon Im, Jae-Min Kim, and Young-Sang Kim "Spectral tag method for enhancing FBG multiplexing capability", Proc. SPIE 6890, Optical Components and Materials V, 689013 (5 February 2008); https://doi.org/10.1117/12.762371

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