Multiplexing scheme for self-interfering long-period fiber gratings using a low-coherence reflectometry
2007 (English)In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 7, no 11-12, 1663-1667 p.Article in journal (Refereed) Published
A novel multiplexing scheme based on a low-coherence reflectometry (LCR) is proposed for a sensing array (in parallel) of self-interfering long-period fiber gratings (SI-LPGs). Each SI-LPG sensor consists of an LPG and a section of fiber with a highly reflective end (mirror). The spectral information of each LPG is sensitive to some parameters of the surrounding measurand and can be reconstructed from the corresponding subreflectograms (obtained by the LCR) through a fast Fourier transformation. The sensing signals of multiple SI-LPG sensors can be multiplexed if the length of the fiber section in each sensor is set to a different value. Experiments of measuring the surrounding temperature at different sensors are demonstrated to show the good performance of our multiplexing system.
Place, publisher, year, edition, pages
2007. Vol. 7, no 11-12, 1663-1667 p.
long-period grating, Michelson interferometer, multiplexing system, optical low-coherence reflectometry (LCR), self-interfering, mach-zehnder interferometers, refractive-index, sensors, temperature, wavelength
IdentifiersURN: urn:nbn:se:kth:diva-17137DOI: 10.1109/jsen.2007.909089ISI: 000251294700024ScopusID: 2-s2.0-35648930443OAI: oai:DiVA.org:kth-17137DiVA: diva2:335180
QC 201005252010-08-052010-08-052013-11-19Bibliographically approved